JP3961760B2 - E-mail device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present inventionHenThe present invention relates to an electronic mail apparatus for transferring collected messages.
[0002]
[Prior art]
With the spread of mobile terminals with excellent portability, such as mobile phones equipped with functions for using e-mail services, messages that have arrived at e-mail servers or terminal devices on the premises of companies are received on the go Or transfer to a mobile terminal.
[0003]
In addition, in a software (mailer) for sending and receiving e-mails executed by a general-purpose information processing apparatus such as a personal computer (PC), the message (particularly the text) is encrypted so that the content of the message is not read. Some have an encryption / decryption function for transmission. Between mailers having such a function, the transmitting side transmits an encrypted message, and the receiving side decrypts the received message to restore the contents. As a result, even if the message is seen by others when it is transmitted, the possibility of the content of the message leaking can be reduced.
[0004]
[Problems to be solved by the invention]
However, mobile terminals such as those described above are often limited in data capacity, display capability, and the like due to demands for weight reduction and low power consumption. For example, the number of characters of messages that can be transmitted / received is limited or encrypted. / Decryption function may not be implemented. For this reason, even if the transmitting mailer encrypts and transmits the message, the receiving portable terminal may not be able to decrypt the message.
[0005]
Since an unencrypted message is transmitted to a mobile terminal that is not equipped with such an encryption / decryption function, if a network such as the Internet is used for the transmission path, In some cases, a message being transmitted is received, and the content of the message may be leaked.
[0006]
In addition, depending on the operating environment of the mobile terminal, there is a possibility that the display of an electronic document such as an e-mail message may be peeped by those around. For example, in a congested environment, it may be difficult to operate in a state where the display unit of the mobile terminal is isolated from the field of view of the surrounding people. Furthermore, since it is small and light, it is easy to lose the mobile terminal, and there is a possibility that the content of the message can be seen by the person who acquired the lost mobile terminal.
[0007]
  The present invention has been made in view of the above-described problems, and can contribute to reducing the possibility of leakage of the contents of electronic documents such as e-mail messages and text format files.RudenAn object is to provide a child mail device.
[0008]
[Means for Solving the Problems]
  Main departureTomorrowA mask determining means for determining whether or not to perform mask processing on the message according to address information relating to the message to be transferred, and executing mask processing on a preset mask processing range in the message When the mask processing unit and the mask determination unit determine not to perform mask processing, the message to be transferred is transferred to the address specified by the address information, and the mask determination unit performs mask processing. A transfer means for transferring the message masked by the mask processing means to an address designated by the address information when it is determined;RudenChild mail deviceThe mask determination means has the same sender address and destination address domain name in the message to be transferred, and the destination address and the destination address domain name set in advance for the destination address are the same. If not, it is determined that mask processing is performed.
  Further, another invention relates to a mask determination means for determining whether or not to mask a message according to address information relating to the message to be transferred, and a mask processing range set in advance in the message. A mask processing unit that executes mask processing, and when the mask determination unit determines not to perform mask processing, the message to be transferred is transferred to an address specified by the address information, and the mask determination unit If the electronic mail apparatus comprises a transfer means for transferring the message masked by the mask processing means to the address specified by the address information, the An internal domain storage means for registering a domain name, and the mask determination means The sender address and the destination address domain name in the message to be transferred are stored in the internal domain storage means, and the domain name of the transfer destination address preset for the destination address is stored in the internal domain storage means. It is characterized in that it is determined that the mask process is performed when it is not stored.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing a configuration of an electronic document editing apparatus according to the first embodiment of the present invention. This electronic document editing apparatus is used for editing an electronic document (data including character information) such as a message to be transmitted as an e-mail, for example. As shown in FIG. A mask processing range determining unit 1 that determines a range (mask processing range) for performing mask processing in an electronic document supplied in response to an instruction from a mail server (for example, an SMTP (Simple Mail Transfer Protocol) server) or a user; A mask processing unit 2 that performs mask processing on the determined mask processing range, and an output unit 3 that outputs the masked electronic document to, for example, an e-mail server or a predetermined directory are provided.
[0010]
The mask processing range determination unit 1 determines a mask processing range for performing mask processing according to the type of electronic document supplied from the outside. That is, when the electronic document is supplied from the outside, the mask processing range determination unit 1 determines the type of the electronic document.
[0011]
The e-mail message includes a destination address [To: field description To: aaa @ bb #. ccc], title [Subject: field description Subject: abt. . . . ] Or the like is added. Therefore, it can be determined whether or not the message is an e-mail message based on the presence or absence of the header information.
[0012]
If the supplied electronic document is other than an e-mail message, the type of the electronic document is determined based on, for example, a file extension. In a certain type of operating system (OS), an extension corresponding to the data format of the file may be added to the file name of the electronic document. For example, the extension “.txt” is assigned to a standard text format (standard text format) in which the internal data is a list of character codes. For this reason, when such an extension is used, it is possible to determine the data format that is one of the elements for determining the type of the electronic document based on the extension of the file name of the file of the electronic document. it can.
[0013]
Other formats having an internal data structure similar to the standard text format include, for example, an e-mail message format (corresponding to the extension “.eml”), HTML format, CSV format, and the like. In the case of these formats, the electronic document file can be accessed in the same procedure as the standard text format. Therefore, in this electronic document editing apparatus, for example, a standard text format corresponding to the extension “.txt”, an HTML format corresponding to the extension “.html”, and a CSV format corresponding to the extension “.csv” (comma “ , ", One of the data formats representing a table delimited by line breaks), etc. are also collectively treated as" text format ". For files other than the text format, mask processing corresponding to the file format is separately defined or mask processing is not performed.
[0014]
When the type of electronic document is determined, the mask processing range determination unit 1 determines the mask processing range according to the type of electronic document. For this purpose, a rule for determining a mask processing range is set in advance for each type of electronic document, and one of these rules is selected according to the type of electronic document detected as described above, and selected. The mask processing range is determined according to the rule.
[0015]
For example, when the electronic document type is an e-mail message, the title [Subject: field description Subject: abt. . . . ], Sender address [From: field description From: xxx @ yy #. zzz], destination address [To: field description To: aaa @ bb #. ccc] and the body of the e-mail are set as a mask processing range, and the remaining header information is not set as a mask processing range. In the case of the text format, for example, the entire range is set as the mask processing range (although it may be part of the electronic document).
[0016]
When the mask processing range is determined by the mask processing range determination unit 1, the mask processing unit 2 extracts a confidential portion from the mask processing range of the electronic document supplied from the outside, and performs mask processing on the extracted confidential portion. Execute. The confidential portion is, for example, a proper noun such as a place name, a product name, a company name, and a name, an amount, a date, a number, a unit, and the like.
[0017]
The mask processing unit 2 includes, for example, a mask location extraction unit 20 that extracts a confidential part (may be other than a confidential part) that needs to maintain confidentiality within the mask processing range determined by the mask processing range determination unit 1, and an extraction Rules for integrating the proper nouns extracted by the proper noun dictionary unit 22 and the proper noun dictionary unit 22 for registering the proper nouns to be the secret parts. An integrated rule storage unit 23 that stores (integrated rules) and an extraction rule storage unit 24 that stores rules for extracting confidential parts other than proper nouns are provided.
[0018]
Among the extraction of confidential parts in the mask part extraction unit 20, the extraction of proper nouns can be found in, for example, the technical report “Comparison of Japanese and English in proper noun extraction”, NLC98-21, pp. 45-52, 1998. Do as indicated.
[0019]
In this method, first, a character string constituting an electronic document is divided according to character type, two or more consecutive characters other than hiragana and punctuation marks are extracted, and stored in the proper noun dictionary unit 22 from the extracted characters. Extract appropriate nouns. As shown in FIG. 2, the proper noun dictionary unit 22 stores proper nouns classified by type. When the proper noun is extracted in this way, the mask location extraction unit 20 adds a so-called SGML tag (a character string sandwiched between “<” and “>”) before and after the proper noun.
[0020]
When extracting the proper noun by adding the SGML tag as described above, the mask location extraction unit 20 integrates the extracted proper noun by the integration rule. The integrated rule storage unit 23 stores rules (integrated rules) for this purpose as shown in FIG.
[0021]
In addition, extraction of confidential parts other than proper nouns, such as the amount of money, date, etc., is performed by, for example, pattern matching that compares a pre-registered rule with an electronic document. Therefore, as shown in FIG. 4, the extraction rule storage unit 24 stores rules (extraction rules) for extracting amounts, dates and the like.
[0022]
When the mask portion (secret portion) is extracted as described above, the replacement processing unit 21 replaces the secret portion with a predetermined character, for example, an asterisk “**”. The electronic document with the confidential part masked in this way is output by the output unit 3 to, for example, an e-mail server or a predetermined directory.
[0023]
The detailed operation of the electronic document editing apparatus configured as described above will be described below.
When an electronic document is supplied from the outside, the processing from step S100 in FIG. 5 is started. In this step S100, the mask processing range determination unit 1 determines whether the supplied electronic document is an e-mail message. In order to determine whether or not there is header information at the head of the electronic document, it is confirmed. If there is header information, it is determined that the message is an e-mail message, and the process proceeds to step S120.
[0024]
In step S110, the mask processing range determination unit 1 uses the above-mentioned “.txt”, “.csv”, “.html”, etc., in which the extension added to the file name of the supplied electronic document is handled as a text format. If the file extension is not one of these extensions, the process ends as a type of electronic document that cannot be edited by the electronic document editing apparatus. On the other hand, if the extension added to the file name of the supplied electronic document is one of the above-mentioned extensions, it is determined that the type of the electronic document is text format, and the process proceeds to step S150. The process proceeds to step S160 with the entire document as the mask processing range.
[0025]
On the other hand, in the processing after step S120, first, the sender address (From: field) in the header information is set as the mask processing range in step S120, and then the destination address (To: field) is set as the mask processing range in step S130. Further, in step S140, the process proceeds to step S160 with the title (Subject: field) and the body of the message as the mask processing range.
[0026]
It should be noted that the sender address and the destination address are masked in steps S120 and S130, respectively, and the mask processing range in the later (step) mask processing may be only the title and the message body. In addition, the masking process of the address in these steps is performed, for example, when the part indicating the organization to which the domain name belongs in the address, for example, when the address is “xxx@h$gehog#.co.jp” When the portion “h $ gehog #” at the third level or higher and the address is “xxx@%geho&e.com”, the portion “% geho & e” at the second level or higher of the domain name is set to a predetermined character, for example, “* * Replaced with “,” etc. Thus, if the address of the part indicating the affiliated organization of the domain name is masked, the affiliated organization such as the sender cannot be specified with the remaining domain name “co.jp” or “.com”.
[0027]
In step S160, it is determined whether or not the process has been completed for the entire mask processing range. If the process has not been completed, the following steps S170 to S190 are repeated. If the process has been completed, the process proceeds to step S200.
[0028]
In step S170, the mask location extraction unit 20 extracts a character string to be masked from the mask processing range of the electronic document. In the proper noun dictionary unit 22 in the mask processing unit 2 described above, as shown in FIG. 2, in order to extract the proper nouns described above, the list names and proper nouns in the categories are associated with each proper noun category. Registered. The mask location extraction unit 20 compares the words in the electronic document with the proper nouns registered in the proper noun dictionary unit 22, and the matching words are surrounded by tags ("<", ">" including list names). Enclose in characters [in this case list name]).
[0029]
Accordingly, for example, the word “ABC Electric Co., Ltd.” shown in FIG. 6A is a tag <on> corresponding to the organization name list (on), organization modifier list (onm), organization name affix list (os), </ on>, <onm>, </ onm>, <os>, </ os>, and as shown in FIG. 5B, “<on> ABC </ on> <onm> electricity < / onm> <os> corporation </ os> ”. Further, for example, the word “Kawada-sama” shown in FIG. 6A corresponds to the tags <pn>, </ pn>, <ps>, </ ps> corresponding to the personal name list (pn) and personal name affix list (ps). , And converted into “<pn> Kawada </ pn> <ps> </ ps>” as shown in FIG.
[0030]
In addition, as shown in FIG. 4 described above, the extraction rule storage unit 24 defines conditions for extracting the amount of money, date, etc., which are confidential parts other than proper nouns, by pattern matching. For example, a word that satisfies the condition on the left side is converted into a format defined on the right side. Specifically, for example, a word in which a numerical value defined on the left side and a character “yen” are continuous is converted into a format defined on the right side, and the tag <amount>, </ The character “yen” enclosed in the amount of money> and defined in the second term on the right side is added. Thus, for example, according to the rule (1) in FIG. 4, the numerical value portion “5,000,000” in the word “5,000,000 yen” in the e-mail message in FIG. >, </ Amount> and is converted into “<amount> 5,000,000 </ amount> yen” as shown in FIG.
[0031]
In step S180, the character strings extracted in step S170 are integrated according to the above-described integration rule. In the integration rule storage unit 23, as shown in FIG. 3 described above, integration rules for integrating the extracted proper nouns are recorded. By this integration rule, a plurality of proper nouns corresponding to the list name on the left side in the figure (for example, the organization name list corresponding to the list name on and the organization modifier list corresponding to the list name onm) are one proper noun on the right side. (Organization name list corresponding to list name on).
[0032]
As a result, for example, the confidential part “<on> ABC </ on> <onm> Electric </ onm> <os> corporation </ os>” in FIG. ) Once converted into “<on> ABC Electric </ on> <os> Corporation </ os>” and then, according to the integration rule (3) in FIG. on> ”and further converted into“ <o> ABC Electric Co., Ltd. </ o> ”as shown in FIG. 6C by the integration rule (9) in FIG. Also, for example, the confidential portion “<pn> Kawada </ pn> <ps> </ ps>” in FIG. 6B is shown in FIG. 3C by the integration rule (2) in FIG. <p> Kawada </ p> <ps> Like </ ps> ”. By integrating such confidential parts, a series of related words can be processed as one confidential part, and it is easy to perform an appropriate masking process according to the word usage in a later step. become.
[0033]
In step S190, the confidential part is masked. As described above, when the confidential part is surrounded by the tag, the replacement processing unit 21 replaces the character of the confidential part made up of the tag and the part surrounded by the tag with a predetermined character, for example, an asterisk “**”. The process returns to S160. At this time, it is not necessary to maintain confidentiality of the character strings listed as examples in the affix list (for example, the person name affix list, organization name affix list, place name affix list, etc.) shown in FIG. Because it is possible, substitution is not performed for character strings that match these. For example, the replacement processing unit 21 compares the character string of the confidential portion with the example in the affix list by pattern matching or the like, and selects a portion to replace the character. Thus, for example, the part other than the example “corporation” in the organization name affix list of the confidential part “<o> ABC Electric Co., Ltd. </ O>” shown in FIG. 6C is replaced with the character “**”. As shown in FIG. 6D, it is converted into “** Corporation”. In addition, in the confidential part “<p> Kawada </ p> <ps>” </ ps> ”in FIG. 6C, the part other than“ Example ”in the person name affix list is the character“ ** ”. It is replaced and converted into “**-like” as shown in FIG. Also, the confidential portion “<p> Taro Yamada </ p>” in FIG. 6C is replaced with the character “**” and converted to “**” as shown in FIG. 6D. In the character string “<amount> 5,000,000 </ amount> yen” in FIG. 6C, only the confidential part “<amount> 5,000,000 </ amount>” has the characters “*”. * "Is substituted and converted to" ** circle "as shown in FIG.
[0034]
When the processes from step S170 to step S190 are repeated and the mask process for all confidential parts is completed, the process proceeds from step S160 to step S200, and the electronic document in which the output unit 3 is masked in step S200 (for example, The message is output to an SMTP server for sending a message, a mailer for displaying the message, or a predetermined directory, and the process is terminated.
[0035]
By masking the confidential part in the electronic document in this way, other people cannot understand the contents of the electronic document. However, if it is the person himself, the electronic document is based on business knowledge, unmasked header information, etc. Can understand the rough contents of the document.
[0036]
As described above, in the electronic document editing apparatus of this embodiment, the type of the supplied electronic document is determined, the mask processing range for performing the mask process is determined according to the type of the electronic document, and the supplied electronic document By masking and outputting the mask processing range, the confidential part can be masked if the conditions for the confidential part are set as the mask processing range. For example, an electronic document such as e-mail It is possible to contribute to the reduction of the possibility of leakage of the contents.
[0037]
In the above description, the case where mask processing is executed in advance for an e-mail message to be transmitted / transferred to a mobile terminal or the like has been described. For the purpose of securing only, it is possible to provide a means for masking e-mail messages on the mobile terminal side, and only the message after masking without displaying the original text of the received message on the mobile terminal side. May be sufficient to reduce the possibility of leakage of the content of the received message. Furthermore, if the received message is quickly masked and the original text is erased, the possibility of leakage of the message content can be further reduced. In addition, by providing a means for performing mask processing on the mobile terminal side in this way, there is an advantage that an existing apparatus such as a normal SMTP server can be used as it is in the apparatus on the transmission side.
[0038]
In addition, when there is a margin in processing capacity on the mobile terminal side, a decryption means is installed so that the received message encrypted on the mobile terminal side is decrypted and then masked for display. May be. This can also reduce the possibility of leakage during message transmission.
[0039]
In the above description, an example is shown in which a tag is used as information for indicating the mask processing range. However, if the mask processing range can be recognized, for example, a predetermined control code may be inserted instead of the tag, or the electronic document It can be changed as appropriate, for example, as position information indicating the mask processing range in the data.
[0040]
In addition, (1) the mask processing mode is not limited to the process of replacing the confidential portion with the character “**”, and (2) the mask processing range and mask processing mode of the e-mail message are set for each message type. (3) When the electronic document type is a text document, a mask processing range and a mask processing mode may be set for each extension or content.
[0041]
FIG. 7 is a block diagram showing a configuration of an electronic document editing apparatus according to the second embodiment of the present invention. This electronic document editing apparatus includes a mask processing range determination unit 1, a mask processing unit 102, and an output unit 3, similarly to the electronic document editing apparatus according to the first embodiment shown in FIG.
[0042]
In the electronic document editing apparatus according to the first embodiment described above, all confidential portions are replaced with predetermined character strings. Although the confidentiality is excellent, the original user of the electronic document can It may be difficult to understand (to a certain extent). For this reason, in the electronic document editing apparatus of this embodiment, the proper noun of the confidential part is converted into an initial letter (initial), and the other part is converted into a predetermined character as in the first embodiment.
[0043]
For this reason, in this embodiment, as shown in FIG. 7, in addition to the configuration of the mask processing unit 2 in FIG. 1, the mask processing unit 102 reads the confidential portion extracted by the mask location extracting unit 20. A reading determination unit 25 that determines and supplies to the replacement processing unit 21 and a reading information storage unit 26 that stores reading information that is referred to by the reading determination unit 25 to determine reading are provided.
[0044]
In the reading information storage unit 26, for example, as shown in FIG. 8, a character string of a proper noun and a reading of this character string (in Roman letters) are stored in association with each other. The reading determination unit 25 determines the reading of the proper noun extracted by the mask location extraction unit 20 with reference to the reading information storage unit 26, and determines the initial of the proper noun by this reading. Further, the replacement processing unit 21 converts the character in the confidential range into a predetermined character as in the first embodiment described above. At this time, the proper noun in the confidential range is converted into an alphabet indicating the initial.
[0045]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 102 executes the following process.
First, in the process shown in FIG. 9, the same processes as those in steps S100 to S180 and S200 in the flowchart shown in FIG. 5 are executed. However, instead of the process in step S190, steps S300 to S300 shown in FIG. The process shown in S330 is executed.
[0046]
Similar to the operation in the flowchart shown in FIG. 5 described above, when the confidential part is extracted as a character surrounded by a tag by the processing up to step S180, in step S300 in FIG. It is determined whether or not the confidential part extracted by the location extraction unit 20 is a proper noun. If it is not a proper noun, the process proceeds to step S330. For example, the character “**” is substituted and the process returns to step S160.
[0047]
On the other hand, if the extracted confidential part is a proper noun, the process proceeds to step S310, and the reading determination unit 25 acquires the reading corresponding to the confidential part, that is, the character string surrounded by the tag, from the reading information storage unit 26, and The reading of the confidential part is determined, and the process proceeds to subsequent step S320. When the reading of the confidential part itself is not stored in the reading information storage unit 26, the reading determination unit 25 acquires the reading of the first character of the confidential part. For example, the reading of the confidential part “<p> Taro Yamada </ p>” itself extracted from the electronic document shown in FIG. 10A is not stored in the reading information storage unit 26, but the reading of “mountain” is stored. Therefore, the reading of the confidential part is “Yama”.
[0048]
In step S320, the replacement processing unit 21 replaces the confidential portion with the reading initial determined as described above, and returns to step S160. As a result, the confidential portion “<p> Taro Yamada </ p>” whose reading “Yamata...” Has been determined as described above is replaced with the letter “Y” as shown in FIG. . In addition, “ABC Electric”, “Kawada”, “Product A Server”, “Product B Server”, and “Yamada Construction” in FIG. 10A are similarly denoted by letters “A”, “K”, and “S”, respectively. "," S ", and" Y ".
[0049]
When the processes from Step S170 to Step S180 and Step S300 to Step S330 are repeated and mask processing for all the confidential parts is completed, the process proceeds from Step S160 to Step S200 in the same manner as the process in FIG. In step S200, the output unit 3 outputs the electronic document subjected to the masking process, and the process ends.
[0050]
As described above, in the electronic document editing apparatus of this embodiment, instead of replacing all the proper nouns in the confidential portion with predetermined characters (characters), the electronic document editing apparatus replaces the proper noun initial with the initial of the proper noun. It is possible to make it easier for the original user to guess the contents of the confidential part.
[0051]
The electronic document editing apparatus according to the third embodiment of the present invention is similar to the electronic document editing apparatus of the first embodiment shown in FIG. 1 described above, and includes a mask processing range determination unit 1, a mask processing unit 2, and an output unit. 3 is provided.
[0052]
In the electronic document editing apparatus according to the first embodiment described above, all the confidential parts are replaced with a certain number of characters, for example, two characters “**”. May want to know the number of digits. For this reason, in this embodiment, the confidential part is replaced with the same number of characters as the number of characters of the extracted confidential part. For example, when the confidential portion is “2000 yen”, the character string “2000” is replaced with four characters that are the number of characters in the character string. By performing such replacement, the number of digits of a numerical value such as an amount can be easily grasped.
[0053]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 2 performs the following process.
First, in the process shown in FIG. 11, the same processes as those in steps S100 to S180 and S200 in the flowchart shown in FIG. 5 are executed. However, instead of the process in step S190, step S400 and step shown in FIG. The process shown in S410 is executed.
[0054]
Similar to the operation in the flowchart shown in FIG. 5 described above, when the confidential part is extracted as a character surrounded by tags by the processing up to step S180, the replacement processing unit 21 in step S400 in FIG. The number of characters in the confidential part is counted, and the process proceeds to subsequent step S410. At this time, the replacement processing unit 21 does not count “, (comma)” included in the amount, the number, etc. as the number of characters. Further, the replacement processing unit 21 does not count the character string that matches the example in the above-mentioned affix list as the number of characters. When the number of characters in the secret portion is counted in this way, the replacement processing unit 21 replaces the secret portion with a predetermined character corresponding to the number of characters, for example, “*” in the subsequent step S410. At this time, as in step S190 described above, substitution is not performed for character strings listed as examples in the affix list (for example, the person name affix list, organization name affix list, place name affix list, etc.). Further, instead of replacing with the same number of characters “*” as the number of characters, it may be replaced with a randomly selected symbol. As a result, the confidential portion of 7 characters is converted into, for example, “! # $% & @ ¥”.
[0055]
Thus, for example, the number of characters to be replaced in the confidential part “ABC Electric Co., Ltd.” in FIG. 12A is five characters “ABC Electric” as shown in FIG. This portion is replaced with “*” for five characters as shown in FIG. Further, the number of characters to be replaced with the confidential portion “5,000,000 yen” in FIG. 12A is seven characters “5000000” as shown in FIG. This part is replaced with “*” for 7 characters as shown in FIG.
[0056]
When the processes from Step S170 to Step S180 and Step S400 to Step S410 are repeated and the mask process for all the confidential parts is completed, the process proceeds from Step S160 to Step S200 in the same manner as the process in FIG. In step S200, the output unit 3 outputs the electronic document subjected to the masking process, and the process ends.
[0057]
As described above, in the electronic document editing apparatus of this embodiment, it is possible to easily grasp the number of digits of a numerical value such as a monetary amount by replacing the secret part with the same number of characters as the extracted secret part. It is possible to easily guess the contents of the confidential part.
[0058]
FIG. 13 is a block diagram showing a configuration of an electronic document editing apparatus according to the fourth embodiment of the present invention. This electronic document editing apparatus includes a mask processing range determination unit 1, a mask processing unit 112, and an output unit 3, similarly to the electronic document editing device of the first embodiment shown in FIG. 1 described above.
[0059]
In the electronic document editing apparatus of each of the embodiments described above, all of the confidential part is replaced with the same character, for example, “*”, but if all items are masked with the same character, the confidential part As a result of difficulty in grasping items, it is sometimes difficult to speculate on confidential parts. Therefore, in this embodiment, the confidential part is replaced with a different character corresponding to the extracted confidential part item.
[0060]
For this reason, in this embodiment, as shown in FIG. 13, the mask processing unit 112 is provided with a mask symbol storage unit 27 that holds characters (mask symbols) corresponding to the types of confidential portions. As shown in FIG. 14, the mask symbol storage unit 27 stores the types of confidential portions and the corresponding mask symbols. The replacement processing unit 21 refers to the mask symbol storage unit 27 and performs masking. For each type of confidential portion extracted by the location extraction unit 20, a mask symbol for replacement is acquired, and replacement is performed using the acquired mask symbol.
[0061]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 112 performs the following process.
First, in the process shown in FIG. 15, the same processes as those in steps S100 to S180 and S200 in the flowchart shown in FIG. 5 described above are executed, but instead of the process in step S190, steps S500 and steps shown in FIG. The process shown in S510 is executed.
[0062]
Similar to the operation in the flowchart shown in FIG. 5 described above, when the confidential part is extracted as a character surrounded by a tag by the processing up to step S180, the replacement processing unit 21 in step S500 in FIG. The type of the confidential part is determined based on the type of the mask, and the mask symbol storage unit 27 is referred to according to the determination result to obtain the mask symbol corresponding to the type of the confidential part. In subsequent step S510, the replacement processing unit 21 performs replacement of the confidential portion by the acquired mask symbol in the same manner as in step S190 described above. Here, when the mask symbol corresponding to the type of the confidential portion is not stored in the mask symbol storage unit 27, the replacement processing unit 21 does not replace the confidential portion. Further, the replacement processing unit 21 performs the replacement for the character strings listed as examples in the affix list (for example, the person name affix list, the organization name affix list, the place name affix list, etc.) as in step S190 described above. Absent.
[0063]
Thereby, for example, “ABC Electric” in the confidential part “ABC Electric Co., Ltd.” in FIG. 16A is replaced with “*” indicating the organization name as shown in FIG. Is converted to “** Corporation”. In addition, “5,000,000” in the confidential part “5,000,000 yen” in FIG. 16A indicates the amount of money as shown in FIG. ) ”And the confidential part is converted to“ (star) (star) circle ”. By looking at the confidential portion thus replaced, the user of the electronic document can easily recognize the type of each item of the confidential portion.
[0064]
When the processes from step S170 to step S180, step S500, and step S510 are repeated and mask processing for all the confidential portions is completed, the process proceeds from step S160 to step S200 in the same manner as the process in FIG. In step S200, the output unit 3 outputs the electronic document subjected to the masking process, and the process ends.
[0065]
As described above, the electronic document editing apparatus according to this embodiment easily recognizes the type of the confidential part by replacing the confidential part with a different character as the character for replacement for each type of the extracted confidential part. And can make it easy to speculate the contents of the confidential part.
[0066]
The electronic document editing apparatus according to the fifth embodiment of the present invention is similar to the electronic document editing apparatus according to the first embodiment shown in FIG. 1 described above, and includes a mask processing range determination unit 1, a mask processing unit 102, and an output unit. 3 is provided.
[0067]
In the electronic document editing apparatus according to the third embodiment described above, all of the confidential part is replaced with a predetermined character having the same number of characters as that of the confidential part, for example, “*”. It is difficult to speculate about the contents of the part. For this reason, in this embodiment, only some characters of the extracted confidential part are replaced. In selecting the character to be replaced, for example, whether or not each character is replaced with a predetermined character is determined at random, and the character to be replaced is replaced.
[0068]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 2 performs the following process.
First, in the process shown in FIG. 17, the same processes as those in steps S100 to S180 and S200 in the flowchart shown in FIG. 5 described above are executed. However, instead of the process in step S190, steps S600 and steps shown in FIG. The process shown in S610 is executed.
[0069]
Similar to the operation in the flowchart shown in FIG. 5 described above, when the confidential part is extracted as a character surrounded by a tag by the processing up to step S180, the replacement processing unit 21 extracts in step S600 in FIG. Whether or not to replace each character of the confidential portion thus determined is determined at random, and the character to be replaced is replaced with a predetermined character in the subsequent step S610.
[0070]
Thereby, for example, the confidential part “Yamada Construction” in FIG. 18A is replaced with “Mountain ** Installation” as shown in FIG. This example shows a replacement example when the replacement probability is 50%. Thus, it becomes easy to speculate the contents of the confidential portion by the characters that are not replaced.
[0071]
When the processes from step S170 to step S180, step S600, and step S610 are repeated and the mask process for all the confidential portions is completed, the process proceeds from step S160 to step S200 in the same manner as the process in FIG. In step S200, the output unit 3 outputs the electronic document subjected to the masking process, and the process ends.
[0072]
As described above, in the electronic document editing apparatus according to this embodiment, by randomly replacing each character of the confidential portion, it is easy to guess the content of the confidential portion using the characters that have not been replaced.
[0073]
FIG. 19 is a block diagram showing a configuration of an electronic document editing apparatus according to the sixth embodiment of the present invention. Similar to the electronic document editing apparatus of the first embodiment shown in FIG. 1 described above, this electronic document editing apparatus includes a mask processing range determination unit 1, a mask processing unit 122, and an output unit 3.
[0074]
In the electronic document editing apparatus according to the third embodiment described above, all of the confidential part is replaced with a predetermined character having the same number of characters as the confidential part, for example, “*”. However, all the confidential parts are masked with the same character. Then, it is difficult to speculate the contents of the confidential part. For this reason, in this embodiment, among the proper nouns in the extracted confidential portion, the same character string is replaced with the same mask character string. Furthermore, in this embodiment, the mask character string is a character or the like indicating the type of the confidential part so that the type of the confidential part can be known. For example, if there are multiple personal names in the confidential part, such as “Mr. Yamada” and “Mr. Tanaka”, replace “Mr. Yamada” with “Personal name 1” so that each can be identified. Replace with “person name 2”.
[0075]
Therefore, in this embodiment, as shown in FIG. 19, the mask processing unit 122 is provided with a replacement information temporary storage unit 28 that temporarily stores the correspondence between the contents of the confidential portion and the character string to be replaced. . In the replacement information temporary storage unit 28, as shown in FIG. 20, the content of the confidential portion extracted by the mask location extraction unit 20, the type of the confidential portion, and the character string to be replaced are stored in association with each other. Yes. If only the same character string is recognized, it is not always necessary to use a character indicating the type of the confidential portion. For example, a unique character string may be used for each same character string. Note that the contents of the replacement information temporary storage unit 28 are cleared for each electronic document in the processing unit, have no data before the replacement process, and before and after the replacement of the proper nouns replaced during the replacement process. The character string is temporarily stored, and is used to replace the character string when the same character string as the character string already replaced in the same electronic document is newly extracted.
[0076]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 122 executes the following process.
First, in the process shown in FIG. 21, the same processes as those in steps S100 to S180 and S200 in the flowchart shown in FIG. 5 are executed. However, instead of the process in step S190, steps S700 to S700 shown in FIG. The process shown in S730 is executed.
[0077]
Similar to the operation in the flowchart shown in FIG. 5 described above, when the confidential portion is extracted as a character surrounded by tags by the processing up to step S180, the replacement processing unit 21 extracts in step S700 in FIG. It is detected whether or not the character string in the classified part is stored in the replacement information temporary storage unit 28. If it is not stored, the process proceeds to the next step S710, where the extracted confidential part is a character indicating the type of the part. , For example, “person name” and a character (for example, “1”) indicating a number (serial number) indicating each confidential part in the type. At this time, the serial number is the smallest number that is not registered in the replacement information temporary storage unit 28. In the subsequent step S720, the replaced character string is registered in the replacement information temporary storage unit 28, and the process returns to step S160.
[0078]
On the other hand, if the extracted character string in the confidential part is stored in the replacement information temporary storage unit 28 in step S700, the process proceeds to step S730, where the character string stored in the replacement information temporary storage unit 28 is replaced. The process returns to step S160.
[0079]
Thereby, the proper noun of the extracted confidential part is replaced with the character indicating the type and the number in the type. For example, “ABC Electric Co., Ltd.” in (1) in FIG. 22A is assumed to be the first organization name in the document, and as shown in FIG. ”And registered in the replacement information temporary storage unit 28 as [Organization name 1]. In addition, when processing “ABC Electric” in (2) in FIG. 22A, the character string is already registered in the replacement information temporary storage unit 28 as [Organization name 1]. As shown in FIG. (B), the character string is replaced with “[organization name 1]”. Further, when processing “Yamada Construction Co., Ltd.” in (3) in FIG. 22A, the character string is not registered in the replacement information temporary storage unit 28, and [organization name 1] is already stored. Since it is registered in the replacement information temporary storage unit 28, the character string is replaced with “[organization name 2] corporation” as shown in FIG. Also, “Kawada-sama” in FIG. 22A is replaced with “[Personal name 1] -like” as shown in FIG.
[0080]
When the processes from Step S170 to Step S180 and Step S700 to Step S730 are repeated and the mask process for all the confidential parts is completed, the process proceeds from Step S160 to Step S200 in the same manner as the process in FIG. In step S200, the output unit 3 outputs the electronic document subjected to the masking process, and the process ends.
[0081]
As described above, in the electronic document editing apparatus of this embodiment, the same character string before the mask corresponding to the same mask character string is the same by replacing the same proper noun in the extracted confidential part with the same character string. You can know that it was. Further, by replacing the same proper noun with a character string corresponding to the type of the proper noun, for example, the type indicating the type, the type of the proper noun masked can be known. This makes it easier to guess the contents of the confidential part.
[0082]
FIG. 23 is a block diagram showing a configuration of an electronic document editing apparatus according to the seventh embodiment of the present invention. This electronic document editing apparatus includes a mask processing range determination unit 1, a mask processing unit 132, and an output unit 3 in the same manner as the electronic document editing apparatus according to the sixth embodiment shown in FIG.
[0083]
In the electronic document editing apparatus of the sixth embodiment described above, in order to replace the same character string in the confidential part with the same mask character string, and to facilitate the recognition of the type of the confidential part, Although the string is a character string indicating the type of the confidential part, it may be difficult to infer the character string before the mask only with this. Therefore, in this embodiment, a character string (associative information) that is likely to be useful for associating the contents of the confidential part from the mask character string is added to the electronic document.
[0084]
Therefore, in this embodiment, in addition to the configuration of FIG. 19, the mask processing unit 132 is provided with an associative information storage unit 29 that stores the contents of the confidential portion and the associative information in association with each other. In the association information storage unit 29, as shown in FIG. 24, the content of the confidential part extracted by the mask location extraction unit 20, the type of the confidential part, and the association information are stored in association with each other. For example, “ABC Electric” is associated with the type organization name (o) and the association information “represents our company”, and “Yamada Construction” is associated with the type organization name (o) and the association. The information “is a construction company of a business partner” is associated.
[0085]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 132 performs the same process as in FIG.
At this time, in step S720 in FIG. 21, after the new character string of the confidential part is registered in the replacement information temporary storage unit 28, the confidential information registered in the replacement information temporary storage unit 28 with reference to the associative information storage unit 29 If the associative information corresponding to the character string is registered, this is obtained, and the mask character string corresponding to the character string of the confidential part is associated with the acquired associative information at the end of the electronic document after the mask processing. Append. In addition, you may provide the step which performs the same process between step S710 and step S720.
[0086]
When such processing is performed and the processing from step S170 to step S180 and step S700 to step S730 in FIG. 21 described above is repeated and the mask processing for all confidential portions is completed, FIG. 25A shows. In the electronic document, as shown in FIG. 5B, the same proper noun is replaced with the same mask character string as in the sixth embodiment, and the associative information corresponding to the mask character string is added at the end of the sentence. Is converted to an electronic document to which is added. Note that instead of adding associative information to the end of the sentence, it may be a separate file, or may be another message or an attached file of the message when editing an e-mail message, for example.
[0087]
As described above, in the electronic document editing apparatus of this embodiment, in addition to the effects of the above-described sixth embodiment, it is easier to estimate the content of the confidential part before replacement by using the associative information corresponding to the mask character string. Can be done.
[0088]
FIG. 26 is a block diagram showing a configuration of an electronic document editing apparatus according to the eighth embodiment of the present invention. This electronic document editing apparatus includes a mask processing range determination unit 1, a mask processing unit 142, and an output unit 3, similarly to the electronic document editing apparatus according to the first embodiment shown in FIG.
[0089]
In the electronic document editing apparatus according to the seventh embodiment described above, in order to replace the same character string in the confidential part with the same mask character string, and to facilitate the recognition of the type of the confidential part, The column is a character string indicating the type of the confidential part, and further, associative information that is useful for associating the contents of the confidential part from the mask character string is added.
[0090]
This association information is known to insiders (or well-known to insiders) but not to outsiders. For example, internal nicknames, products, etc. When codes can be used, these nicknames, internal codes, etc. can also be used as mask character strings. Also, if a nickname, internal code, etc. known to the insider is used as a mask character string, the correspondence between the mask character string and the associative information is not shown at the end of the sentence as in the seventh embodiment. Also, the content of the confidential part corresponding to the mask character string can be estimated (easily).
[0091]
For this reason, in addition to the configuration of the electronic document editing apparatus of the first embodiment described above, this electronic document editing apparatus has a character string (associative) that is likely to be useful for associating the contents of the confidential part with the mask processing unit 142. An associative information storage unit 29 for storing information). Unlike the above-described FIG. 24, the associative information storage unit 29 stores the above-mentioned nickname, internal code, etc., which are also used as a mask character string, as associative information corresponding to the content of the confidential part and the type of the confidential part Yes. This associative information may be set for each proper noun. For example, as shown in FIG. 27, an organization name may be an initial such as associative information “A Electric” corresponding to “ABC Electric”. An abbreviation such as “Yamaken” associated with “Yamada Construction” may be used. Further, for example, in the case of a product name, an internal code such as “SV1995” corresponding to “product A server” can be used.
[0092]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 142 performs the same process as in FIG.
When the processing up to step S180 in FIG. 5 is executed and the confidential portion is extracted by the mask location extraction unit 20, the replacement processing unit 21 of the mask processing unit 142 is extracted instead of the above-described processing in step S190. It is determined whether or not the associative information corresponding to the confidential part is stored in the associative information storage unit 29, and if it is stored, the associative information is acquired, and the character string of the confidential part is replaced with the acquired associative information. The process returns to step S160. If the associative information corresponding to the confidential part is not stored in the associative information storage unit 29, the confidential part is replaced with the character string “**” and the process returns to step S160.
[0093]
Thus, for example, since the confidential part “ABC Electric” in FIG. 28A is stored in the associative information storage unit 29, as shown in FIG. 28B, the associative information “ Converted to "A electricity". Similarly, since the confidential parts “product A server”, “product B server”, and “Yamada construction” in FIG. 28A are stored in the associative information storage unit 29, as shown in FIG. Are converted into corresponding association information “SV1995”, “SV1997”, and “Yamaken”. Further, since the confidential part “Kawada-sama” in FIG. 28A is not stored in the associative information storage unit 29, the proper noun part is replaced with the characters “**”, as shown in FIG. Is converted into “**-like”.
[0094]
By performing such processing, the processing from step S170 to step S190 in FIG. 5 described above is repeated, and when the mask processing for all the confidential portions is completed, the process proceeds from step S160 to step S200, and output in this step S200. The unit 3 outputs the masked electronic document and ends the process.
[0095]
As described above, in the electronic document editing apparatus according to this embodiment, the content of the confidential part before replacement is estimated by replacing the confidential part with a nickname known to the insider and a mask character string based on the internal code. Can be performed more easily. Further, unlike the seventh embodiment, it is not necessary to separately associate a mask character string with associative information and add it to the electronic document after the mask process, so that an increase in the data size of the electronic document can be suppressed. .
[0096]
The electronic document editing apparatus according to the ninth embodiment of the present invention is similar to the electronic document editing apparatus according to the second embodiment shown in FIG. 7 described above, and includes a mask processing range determination unit 1, a mask processing unit 102, and an output unit. 3 is provided.
[0097]
In the electronic document editing apparatus of the second embodiment described above, the proper noun of the confidential part is replaced with the initial. However, it may not be easy to guess the content of the confidential part only with the initial.
[0098]
For this reason, in this embodiment, after determining the proper noun reading of the confidential portion in the same manner as in the second embodiment described above, the confidential portion is represented by a character string of a part of Roman characters (for example, consonant) indicating the reading. Is replaced. For this purpose, the replacement processing unit 21 generates a mask character string in which the vowels are removed from the reading of the proper part proper noun determined by the reading determination unit 25, and replaces the confidential part with this mask character string.
[0099]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 102 executes the following process.
First, in the process shown in FIG. 29, the same processes as those in steps S100 to S180 and step S200 in the flowchart shown in FIG. 5 are executed, but steps S300 and steps shown in FIG. The process shown in S800 to Step S860 is executed.
[0100]
Similar to the operation in the flowchart shown in FIG. 5 described above, when the confidential part is extracted as a character surrounded by a tag by the processing up to step S180, in step S300 in FIG. It is determined whether or not the confidential part extracted by the location extraction unit 20 is a proper noun. If it is not a proper noun, the process proceeds to step S330, and the extracted confidential part character is set to a predetermined character (character), as in step S190 described above. For example, the character “**” is substituted and the process returns to step S160.
[0101]
On the other hand, if the extracted confidential part is a proper noun, the process proceeds to step S800, and the reading determination unit 25 completes the processing for all the parts in one confidential part divided by the above-described tag as a processing unit. If not completed, the process from step S810 to step S830 is executed. If completed, the process proceeds to step S840.
[0102]
In step S810, the reading determination unit 25 determines whether or not a character string that completely matches the character string of the confidential part delimited by the tag is registered in the reading information storage unit 26. Proceeding to S830, reading of the completely matched character string is acquired from the reading information storage unit 26, and the process returns to Step S800. For example, the character string “electricity” in the confidential part “<on> ABC </ on> <onm> electricity </ onm>” shown in FIG. 30 is registered in the reading information storage unit 26 and corresponds to this. Get the reading “DeNKi”. On the other hand, if a completely matching character string is not registered, the process proceeds to step S820, where the reading determination unit 25 acquires a reading for each individual character of the confidential portion, and returns to step S800. For example, since the character string “Kawada” in the confidential part “<pn> Kawada </ pn>” shown in FIG. 30 is not registered in the reading information storage unit 26, for each character “Kawa” and “field”. The readings “KaWa” and “Ta” are acquired and set as “KaWa + Ta”. At this time, for example, the alphabet such as the character string “ABC” in the confidential part “<on> ABC </ on> <onm> electric </ onm>” in FIG. Treat as you read.
[0103]
When all the characters in one confidential part are requested to be read by the processing from step S800 to step S830, the process proceeds from step S800 to step S840, and in this step S840, the adjacent confidential part readings in the electronic document are combined. To do. For example, the readings “ABC” and “DeNKi” of the confidential portion “<on> ABC </ on> <onm> electric </ onm>” are set to “ABCDeNKi”. In a subsequent step S850, the vowel is deleted from the combined reading. Thus, the reading “ABCDeNKi” is changed to “ABCDNK”. Further, for example, the reading “KaWaTa” of the character string “Kawada” is set to “KWT”. When the character string from which the vowel has been deleted is obtained in this way, the process proceeds to step S860, where the confidential part is replaced with the obtained character string, and the process returns to step S160.
[0104]
When the processes from step S170 to step S180 and step S800 to step S860 are repeated and the mask process for all the confidential parts is completed, the process proceeds from step S160 to step S200, as in the process in FIG. In step S200, the output unit 3 outputs the electronic document subjected to the masking process, and the process ends. As a result, for example, the confidential character strings “ABC Electric Co., Ltd.” and “Kawada-sama” shown in FIG. 31A are converted into the character strings “ABCNKNK Co., Ltd.” and “KWT Therefore, it is easier to guess the content than when the initial display is performed.
[0105]
As described above, in the electronic document editing apparatus of this embodiment, instead of replacing the proper part of the proper noun with the initial, the part is replaced with a character string of a part of Roman letters (for example, consonant) indicating the reading of the proper noun. As a result, it is possible to make it easier for the original user of the electronic document to guess the content of the confidential portion.
[0106]
FIG. 32 is a block diagram showing a configuration of an electronic document editing apparatus according to the tenth embodiment of the present invention. Similar to the electronic document editing apparatus of the first embodiment shown in FIG. 1 described above, this electronic document editing apparatus includes a mask processing range determination unit 1, a mask processing unit 152, and an output unit 3.
[0107]
This electronic document editing apparatus performs mask processing by replacing the kanji in the confidential portion with another kanji having the same radical as the kanji instead of replacing the confidential portion with a predetermined character.
[0108]
For example, the character “sawa” in the character string “sawamatsu” in the confidential part is converted to a character “decision” having the same “sanzui”, for example, and “pine” is converted to a “branch” having the same “kinen”, for example. To do.
[0109]
For this purpose, in this electronic document editing apparatus, the mask processing unit 152 includes a kanji radical information storage unit 30 for detecting kanji with the same radical. For example, as shown in FIG. 33, the kanji radical information storage unit 30 stores a kanji radical and a kanji having the radical in association with each other.
[0110]
In order to perform the replacement process as described above, the replacement processing unit 21 of the mask processing unit 152 executes the following process.
First, in the process shown in FIG. 34, the same processes as those in steps S100 to S180 and S200 in the flowchart shown in FIG. 5 are executed, but steps S900 to S900 shown in FIG. The process up to S940 is executed.
[0111]
Similar to the operation in the flowchart shown in FIG. 5 described above, when the confidential part is extracted as a character surrounded by tags by the processing up to step S180, the replacement processing unit 21 in step S900 in FIG. It is determined whether or not the processing has been completed for all the characters in one confidential portion. If not, the processing from step S910 to step S940 is executed. If the processing has been completed, the processing proceeds to step S200.
[0112]
In step S910, one character in the confidential portion is set as a processing target, and it is determined whether or not the processing target character is a kanji character. If it is not a kanji character, the process proceeds to step S940. In step S920, the replacement processing unit 21 acquires a Chinese character having the same radical as the target Chinese character from the Chinese character radical information storage unit 30. The kanji to be acquired may be selected at random from those stored in the kanji radical information storage unit 30, or a rule for conversion according to kanji reading etc. is defined and selected accordingly You may make it do. When the kanji having the same radical as the processing target kanji is acquired, the replacement processing unit 21 proceeds to step S930, replaces the processing target kanji with the acquired kanji, and returns to step S900. Thus, for example, the confidential portion “ABC Electric” shown in FIG. 35A is replaced with “snow” having the same “Amekanmuri” in the Chinese character “Den” as shown in FIG. The Chinese character “Ki” is replaced with “氣” having the same “Kigamae”. In this way, by converting into kanji having the same radical, it becomes easier to guess the contents of the confidential part.
[0113]
On the other hand, if the character to be processed is not a Chinese character, the process proceeds from step S910 to step S940, the character to be processed is replaced with a predetermined character, for example, “*”, and the process returns to step S900. Thereby, for example, the character string “ABC” in the confidential portion “ABC Electric” shown in FIG. 35A is replaced with “*” of three characters as shown in FIG.
[0114]
When the mask processing for all the characters in one confidential portion is completed by the processing from step S900 to step S940, the process returns from step S900 to step S160. When the mask process for all confidential parts in one electronic document is completed, the process proceeds from step S160 to step S200, the output unit 3 outputs the masked electronic document, and the process ends.
[0115]
As described above, in the electronic document editing apparatus of this embodiment, the content of the confidential part is estimated by the original user of the electronic document by replacing the Chinese character of the confidential part with another Chinese character having the same radical. Can be made easier.
[0116]
In each of the above embodiments, the case where the present invention is applied to an electronic document editing apparatus has been described. However, in the following embodiments, the present invention is applied to an electronic mail apparatus for transmitting and receiving a message that is one of electronic documents. The case will be described.
[0117]
FIG. 36 shows the configuration of an electronic mail apparatus according to the eleventh embodiment of the present invention. The electronic mail device 50 includes a transmission / reception unit 51 for transmitting / receiving electronic mail (message) to / from other electronic mail devices connected via a network 40 such as the Internet, an intranet, or a LAN (Local Area Network), and a user. A creation unit 52 for creating a message (transmission message) to be transmitted, a confidentiality determination unit 53 for determining whether or not the transmission message requires confidentiality, and an editing control unit 54 for controlling editing of the transmission message And a baffle processing unit 55 that executes a baffle process corresponding to the above-described masking process on the transmission message, and a transfer destination storage unit 57 that stores a transfer destination address.
[0118]
The electronic mail device 50 is realized by an information processing device such as a personal computer (PC), and the transmission / reception unit 51 is realized by an SMTP server, a POP server, or the like realized by a program executed in the device, for example. Has been. An e-mail system using a protocol other than this may be used. The transmission / reception unit 51 has a function of transferring a message received by the transmission / reception unit 51 to another destination. The transfer destination address indicating the transfer destination is stored in the transfer destination storage unit 57.
[0119]
The creation unit 52 is realized by, for example, a mail transmission / reception program (mailer) executed in the apparatus. Similarly, the security judgment unit 53, the editing control unit 54, and the prone character processing unit 55 are also realized by programs executed in the apparatus.
[0120]
Further, the prone character processing unit 55 performs prone character processing so that secret parts such as proper nouns and numerical values in the message are not known to outsiders. As a specific example of the character processing, the mask processing shown in the above-described embodiments is used.
[0121]
As shown in FIG. 40, the destination storage unit 57 stores a destination address and a destination address in association with each other. That is, the destination address of the message to be transferred by the transmission / reception unit 51 of the electronic mail apparatus 50 and the transfer destination address (transfer destination address) to be transferred are stored in association with each other. In addition, a plurality of transfer destination addresses can be stored for one destination address. For example, in the example of FIG. 40, the destination address Kawa @ bb #. ne. jp to Kawa @ bc #. ne. jp and Kawa @ bd #. ne. jp is registered. Further, for example, when a UNIX (registered trademark) compatible OS is used as the OS of the electronic mail apparatus 50, the transfer destination storage unit 57 can be a forward file of the user of the message destination to be transferred. In this file, the forwarding address is registered. In this case, since the destination address in FIG. 40 described above can be specified by the user's account, it is not necessarily stored in the forward file.
[0122]
Hereinafter, the operation of the electronic mail apparatus configured as described above will be described in the case where a message received by the transmission / reception unit 51 is transferred to another destination.
The confidentiality judgment unit 53 monitors the presence or absence of a transmission request when the transmission / reception unit 51 transfers a message. When there is a transmission request, the confidentiality determination unit 53 starts processing from step S1000 in FIG. Judgment unit 53 accepts the outgoing call request and proceeds to step S1010.
[0123]
In the processing from step S1010 to step S1030, it is determined whether or not the message requested to be transmitted is confidential. Specifically, this determination is made according to the destination of the message. For example, when a message transmitted / received within a so-called intranet in an organization such as a company is transferred to an address outside the intranet, confidentiality is required. to decide.
[0124]
In step S1010, the transmission / reception unit 51 extracts a destination address from the header portion of the message to be transferred, and extracts one transfer destination address corresponding to the extracted destination address from the transfer destination storage unit 57 in the subsequent step S1015. . In subsequent step S1020, the confidentiality judgment unit 53 extracts the sender address from the header portion of the message to be transferred, compares the extracted sender address with the domain name of the destination address, and if they do not match, proceeds to step S1050. If they match, the process proceeds to step S1030. Therefore, if the message is sent / received within the intranet, the sender address and the domain name of the destination address match, and the process proceeds to step S1030. However, if the message is not sent / received within the intranet, the domain name of the sender address and the destination address is determined. Since they do not match, the process proceeds to step S1050.
[0125]
In step S1030, the domain names of the destination address and the forwarding address are compared. If they match, the process proceeds to step S1050. If they do not match, the process proceeds to the next step S1040. Proceed to step S1050. When a message transmitted / received within the intranet is transferred outside the intranet, the domain name of the destination address is different from the domain name of the transfer destination address, so the process proceeds to step S1040. Then, the process proceeds to step S1050.
[0126]
In step S1050, a message instructed to be transferred is transmitted to the transfer destination address, and the flow advances to step S1060. In step S1060, it is determined whether or not the above-described processing from step S1010 to step S1050 has been executed for all transfer destination addresses of the message instructed to transfer, and if processing has not been completed for all transfer destinations, step S1060 is executed. Returning to S1015, the transfer destination address is extracted from the transfer destination storage unit 57 again, and the processing from step S1015 to step S1050 is executed. If the processing has been completed for all transfer destinations, the processing ends.
[0127]
As described above, in the electronic mail apparatus according to this embodiment, as described above, it is determined whether or not confidentiality is required based on the destination address, sender address, and transfer destination address of the message to be transferred. In this case, the masking process can be automatically performed for a transfer destination that requires confidentiality by executing the masking process, that is, performing any one of the mask processes shown in the above-described embodiments and transferring the message.
[0128]
  FIG. 38 shows the configuration of an electronic mail apparatus according to the twelfth embodiment of the present invention. This electronic mail apparatus 50 is the first one shown in FIG.1As in the mail apparatus of the embodiment, the transmission / reception unit 51, the creation unit 52, the confidentiality determination unit 53, the editing control unit 54, and the baffle processing unit 55 are provided, and the domain name of the internal domain in the intranet is stored. An internal domain storage unit 56 is provided.
[0129]
In the above eleventh embodiment, assuming that there is one internal domain in the intranet, the internal / external determination of the intranet is determined by the domain name in the destination address, the sender address, and the forwarding address. However, when there are a plurality of internal domains in the intranet, each domain name is different, and therefore the domain name of the destination address and the sender address may be different even for messages transmitted and received within the intranet. Even in such a case, the mail apparatus according to this embodiment determines whether or not the confidentiality is necessary in consideration of the domain name of the internal domain in the intranet in order to make it a target of the illegitimate processing when the confidentiality is required. It has become.
[0130]
For this purpose, the internal domain storage unit 56 stores the domain names of all internal domains in the intranet, as shown in FIG.
[0131]
In the electronic mail apparatus configured as described above, the same processing as the processing shown in FIG. 37 described above is executed. However, in steps S1020 and S1030 in FIG. Domain names of all internal domains are considered.
[0132]
That is, in step S1020, if both the destination address and sender address domain names are stored in internal domain storage unit 56, it is determined that the domain names match. In step S1030, one of the destination address and the transfer destination address is stored in the internal domain storage unit 56, and if the other is not stored, it is determined that the domain names do not match. By determining the domain name in this way, it is possible to accurately determine the necessity of confidentiality in consideration of the internal domain in the intranet.
[0133]
As described above, in the electronic mail apparatus according to this embodiment, as described above, the necessity of confidentiality is determined based on the domain names of all internal domains in the intranet. Can be done accurately. As a result, it is possible to prevent a message transmitted / received within the intranet requiring confidentiality from being transferred outside the intranet without being masked, thereby contributing to a reduction in the possibility of confidential leakage.
[0134]
【The invention's effect】
In the present invention, by executing a mask process on a processing range determined according to the type of the electronic document in the electronic document supplied from the outside, an e-mail message, a text format file, etc. This can contribute to reducing the possibility of leakage of the contents of the electronic document.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an electronic document editing apparatus according to a first embodiment of the present invention.
FIG. 2 is a diagram showing an example of proper nouns stored in a proper noun dictionary part constituting the electronic document editing apparatus.
FIG. 3 is a diagram illustrating an example of an integration rule stored in an integration rule storage unit configuring the electronic document editing apparatus.
FIG. 4 is a diagram illustrating an example of extraction rules stored in an extraction rule storage unit constituting the electronic document editing apparatus.
FIG. 5 is a flowchart showing an operation of the electronic document editing apparatus.
FIG. 6 is a diagram showing an example of an electronic document in the process of mask processing by the electronic document editing apparatus.
FIG. 7 is a block diagram showing a configuration of an electronic document editing apparatus according to a second embodiment of the present invention.
FIG. 8 is a diagram showing an example of reading information stored in a reading information storage unit constituting the electronic document editing apparatus.
FIG. 9 is a flowchart showing a part of the operation of the electronic document editing apparatus.
FIG. 10 is a diagram illustrating an example of an electronic document before and after mask processing by the electronic document editing apparatus.
FIG. 11 is a flowchart showing a part of the operation of the electronic document editing apparatus according to the third embodiment of the present invention.
FIG. 12 is a diagram showing an example of an electronic document in the process of mask processing by the electronic document editing apparatus.
FIG. 13 is a block diagram showing a configuration of an electronic document editing apparatus according to a fourth embodiment of the present invention.
FIG. 14 is a diagram showing an example of a mask symbol stored in a mask symbol storage unit constituting the electronic document editing apparatus.
FIG. 15 is a flowchart showing a part of the operation of the electronic document editing apparatus.
FIG. 16 is a diagram showing an example of an electronic document in the process of mask processing by the electronic document editing apparatus.
FIG. 17 is a flowchart showing an operation of the electronic document editing apparatus according to the fifth embodiment of the present invention.
FIG. 18 is a diagram illustrating an example of an electronic document before and after mask processing by the electronic document editing apparatus.
FIG. 19 is a block diagram showing a configuration of an electronic document editing apparatus according to a sixth embodiment of the present invention.
FIG. 20 is a diagram illustrating an example of a replacement character string stored in a replacement information temporary storage unit included in the electronic document editing apparatus.
FIG. 21 is a flowchart showing an operation of the electronic document editing apparatus.
FIG. 22 is a diagram illustrating an example of an electronic document before and after mask processing by the electronic document editing apparatus.
FIG. 23 is a block diagram showing a configuration of an electronic document editing apparatus according to a seventh embodiment of the present invention.
FIG. 24 is a diagram showing an example of associative information stored in an associative information storage unit constituting the electronic document editing apparatus.
FIG. 25 is a diagram illustrating an example of an electronic document before and after mask processing by the electronic document editing apparatus.
FIG. 26 is a block diagram showing a configuration of an electronic document editing apparatus according to an eighth embodiment of the present invention.
FIG. 27 is a diagram illustrating an example of associative information stored in an associative information storage unit included in the electronic document editing apparatus.
FIG. 28 is a diagram illustrating an example of an electronic document before and after mask processing by the electronic document editing apparatus.
FIG. 29 is a flowchart showing the operation of the electronic document editing apparatus according to the ninth embodiment of the present invention.
FIG. 30 is a diagram showing an example of proper noun reading conversion by the electronic document editing apparatus.
FIG. 31 is a diagram illustrating an example of an electronic document before and after mask processing by the electronic document editing apparatus.
FIG. 32 is a block diagram showing a configuration of an electronic document editing apparatus according to a tenth embodiment of the present invention.
FIG. 33 is a diagram illustrating an example of a kanji list stored in a kanji radical information storage unit included in the electronic document editing apparatus.
FIG. 34 is a flowchart showing the operation of the electronic document editing apparatus.
FIG. 35 is a diagram illustrating an example of an electronic document before and after mask processing by the electronic document editing apparatus.
FIG. 36 is a block diagram showing a configuration of an electronic mail apparatus according to an eleventh embodiment of the present invention.
FIG. 37 is a flowchart showing the operation of the electronic mail apparatus.
FIG. 38 is a block diagram showing a configuration of an electronic mail apparatus according to a twelfth embodiment of the present invention.
FIG. 39 is a diagram showing an example of data indicating a domain name stored in an internal domain storage unit of the electronic mail apparatus.
FIG. 40 is a diagram illustrating an example of transfer destinations stored in the transfer destination storage unit;
[Explanation of symbols]
1 Mask processing range determination unit
2, 102, 112, 122, 132, 142, 152 ... Mask processing unit
3 Output section
20 Mask location extraction unit
21 Replacement processing part
22 proper noun dictionary
23 Integrated rule storage
24 Extraction rule storage
25 Reading decision section
26 Reading information storage
27 Mask symbol storage
28 Replacement information temporary storage unit
29 association information storage
30 Kanji radical information storage
40 network
50 E-mail device
51 Transceiver
52 Creation Department
53 Confidentiality Judgment Department
54 Editing control section
55 Blob processing section
56 Internal domain storage
57 Transfer destination storage

Claims (4)

Mask determining means for determining whether or not to mask the message according to address information relating to the message to be transferred;
Mask processing means for performing mask processing on a preset mask processing range in the message;
When the mask determination means determines not to perform mask processing, the message to be transferred is transferred to the address specified by the address information, and when the mask determination means determines to perform mask processing in Ru email device and a transfer means for transferring the address specified by the address information of the mask processed message by said mask processing means,
The mask determination means, when the sender address and the destination address domain name in the message to be transferred are the same, and the destination address and the destination address domain name preset for the destination address are not the same An e-mail apparatus characterized by determining that mask processing is to be performed. Mask determining means for determining whether or not to mask the message according to address information relating to the message to be transferred;
Mask processing means for performing mask processing on a preset mask processing range in the message;
When the mask determination means determines not to perform mask processing, the message to be transferred is transferred to the address specified by the address information, and when the mask determination means determines to perform mask processing And an e-mail device comprising transfer means for transferring the message masked by the mask processing means to an address specified by the address information,
An internal domain storage means for registering all internal domain names in the intranet;
The mask determination means stores the sender address and the destination address domain name in the message to be transferred in the internal domain storage means, and the domain name of the transfer destination address preset for the destination address. the internal domain storage means performs a masking process if not stored as determination email device electrostatic you characterized by. When the mask determining unit determines not to perform mask processing, the transfer unit transfers the message to be transferred to a transfer destination address set in advance with respect to a destination address in the message, and the mask If the determination means determines to perform the masking process, electrons according to claim 1 or claim 2 mask processing messages, characterized in that transferred to the transfer destination address by said masking means Mail device. 2. The mask processing means extracts a portion indicating confidential information of the message and executes a mask processing for replacing all or a part of the portion indicating the confidential information with other information. The electronic mail apparatus according to claim 3 .

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