KR101593954B1 - Spam filtering system for preventing filtering of a legal sms and spam filtering method thereof - Google Patents

Abstract

The present invention relates to a spam filtering system for blocking a spam short message and a method for processing a spam short message.

A spam filtering system according to the present invention is a system for filtering a message transmitted from a calling terminal to a called terminal, the system comprising: a receiving unit for receiving a message from the calling terminal, extracting spam judgment information from the message, center; And determining whether the message is a legitimate message based on the spam determination information, and if the message is a legitimate message as a result of the legitimate message determination, transmitting information indicating that the message is not a spam character, And a spam filtering server for performing a spam filtering process on the message if the message is not a message and transmitting the message to the message center based on the result of the spam filtering process.

Spam, Filtering, Short Message, SMS, MMS, Legal, Information, Public Authority, Bank, Government

Description

FIELD OF THE INVENTION [0001] The present invention relates to a spam filtering system for preventing the filtering of legitimate short messages, and a spam filtering method using the same. [0002]

The present invention relates to a spam filtering system for blocking a spam short message and a method for processing a spam short message.

As a short message service in mobile communication is activated, a mobile terminal user can transmit and receive information not only by a conventional voice but also through a character. However, since a spam short message which does not want to be received as a negative phenomenon due to the short message service is often transmitted, complaints of mobile users are increasing. Accordingly, techniques for blocking unwanted spam short messages are being developed by recipients.

There are two main techniques for blocking spam short messages. Initially, a technique for blocking a spam short message in a mobile communication terminal has been mainly devised. According to this technique, after receiving the short message, the mobile terminal determines whether the calling number corresponding to the received short message is included in the reception reject phone book database and includes the calling number corresponding to the received short message The mobile terminal performs a process of rejecting the SMS message. Similarly, if a character string matching the character string stored in the rejection character string database exists in the short message after receiving the short message, the mobile terminal performs a short message reception rejection process. However, according to the related art, since the capacity of the mobile terminal is limited, the number or string that can be stored is limited, and the mobile terminal must determine whether to reject the message and process it.

In recent years, there has been developed a technology for determining whether or not a message is spammed in a mobile communication network, in addition to determining whether or not a message is spammed in the mobile terminal. Wherein the mobile communication network spam filtering system comprises: (1) receiving a short message; (2) filtering the short message based on at least one rule set; and (3) And a short message spam filtering method comprising processing the short message. In the filtering step, the received short message is buffered, main parameters are collected from the message, and a result of the filtering is obtained by applying a rule set.

As described above, in the mobile communication network, when the spam filtering system performs the spam filtering before performing the spam filtering, and the spam filtering is performed by the mobile terminal itself, that is, when the number of the mobile terminal is limited, And the problem of determining whether to reject a message from the mobile terminal and processing the message is solved. However, despite this convenience, new side effects are occurring while performing spam filtering in advance in the mobile communication network. One of them is that the customer does not receive the notices that he should receive.

For example, if a customer does not pay a monthly credit card payment, the card company sends a short message to the customer informing them of the late payment. However, if the spam filtering system sets the condition to block words such as "overdue", the customer will not be able to receive short messages from the credit card. In this case, the customer will not be able to check the short message in time, It will incur the inconvenience and the economic loss to pay the use fee and the late fee.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and it is an object of the present invention to provide a system and a method for preventing a legitimate guidance purpose short message such as a guidance message in a financial institution, A spam filtering system and a spam filtering method.

According to another aspect of the present invention, there is provided a spam filtering system for filtering a message transmitted from a calling terminal to a called terminal, the system comprising: a receiving unit for receiving a message from the calling terminal, A message center for forwarding to the filtering server; And determining whether the message is a legitimate message based on the spam determination information, and if the message is a legitimate message as a result of the legitimate message determination, transmitting information indicating that the message is not a spam character, And a spam filtering server for performing a spam filtering process on the message if the message is not a message and transmitting the message to the message center based on the result of the spam filtering process.

The message center also receives a message from the calling terminal and inquires of the subscriber server whether the called party, who is the owner of the called terminal, has subscribed to the spam blocking service. If the called party subscribes to the spam blocking service It is preferable to transmit the spam judgment information to the spam filtering server.

When the message center receives information indicating that the message is not a spam character from the spam filtering server, the message center transmits the message to the called terminal and blocks the message when receiving the information of spam characters.

A spam filtering server according to an exemplary embodiment of the present invention is a spam filtering server for determining whether a message to be sent to a called terminal by a calling terminal is spammed is characterized in that the spam filtering server comprises: If the message is a legitimate message, transmits information indicating that the message is not a spam message to the message center, and if the message is not a legitimate message, It is desirable to transmit the message to the message center whether it is a spam character or not.

Also, the spam filtering server includes a function of receiving and storing legitimate message information from an input terminal, and determining whether the message is a legitimate message based on a result of comparison between the spam judgment information and the pre-stored legitimate message information Do.

The spam filtering server includes: a legitimate message input unit for receiving and storing legitimate message information from the input terminal; And receiving and storing the stored legitimate message information from the legitimate message input unit, comparing the spam judgment information with the pre-stored legitimate message information to determine whether the message is a legitimate message, and if the message is a legitimate message And a spam filtering unit that transmits information indicating that the message is not a spam character to the message center, and transmits a message to the message center whether or not the message is a legitimate message by performing a spam filtering process on the message .

The legitimate message input unit may include an authentication unit that determines whether the input terminal is an authenticated terminal. A legitimate message temporary DB storing the received legitimate message information; And an uploading unit for transmitting the legitimate message information to the spam filtering unit at a predetermined time, wherein the spam filtering unit includes: a legitimate message DB storing legal message information transmitted from the legitimate message input unit; And a spam determining unit comparing the legitimate message information included in the legitimate message DB with the spam judgment information to determine whether the legitimate message is a legitimate message and performing a spam filtering process on the message.

The legitimate message input unit may further include a legitimate message verification unit for performing verification and management of legitimate message information stored in the legitimate message provisional DB.

The spam judgment information may include any one of a calling number and a reply number extracted from the message and contents of the short message. The legitimate message information may include a calling number, a reply number Wherein the spam filtering server determines the legitimate message if the same data as the spam judgment information is included in the legitimate message information, If the same data as the information is not included in the legitimate message information, it is determined that the legitimate message is not included.

The external input terminal may be any one of a bank terminal, a public entity terminal, a government agency terminal, and a communication service provider terminal.

Meanwhile, a method of filtering spam according to an embodiment of the present invention includes filtering a message transmitted from a calling terminal to a called terminal, the method comprising: extracting spam determination information from the message center after receiving a message from the calling terminal; Extracting spam determination information; The message center delivering the spam determination information to a spam filtering server; Determining whether the message is a legitimate message based on the spam determination information; And if the message is a legitimate message, transmitting information indicating that the message is not a spam letter to a message center, and if the message is not a legitimate message, performing a spam filtering process on the message, And determining whether or not the spam is a spam based on the result.

The method according to claim 1, further comprising a legitimate message input step in which the spam filtering server receives and stores legitimate message information from an input terminal, wherein the legitimate message judging step includes a step of comparing the spam judgment information with the pre- It is desirable to determine whether it is a legitimate message.

And the spam judgment information includes any one of a calling number and a reply number extracted from the message and contents of the short message,

Wherein the legitimate message information includes any one of a call number and a reply number input from the input terminal and contents of the short message,

Wherein the legitimate message determination step determines that the legitimate message is included when the same data as the spam determination information is included in the summed message information, and if the same data as the spam determination information is not included in the legitimate message information It is desirable to judge that it is not a legitimate message.

The method may further comprise input terminal authentication step of determining whether the input terminal is an authenticated terminal, and the legitimate message input step is performed only when the input terminal is authenticated.

And a legitimate message information verification step of identifying the pre-stored legitimate message information.

And when the message center receives information indicating that the message is not a spam from the spam filtering system, the message center transmits the message to the called terminal, and when receiving the information of spam characters, .

And a blocking service subscription determining step of, after the message center receives the message from the calling terminal, inquiring of the subscriber server whether the called party who is the owner of the called terminal has subscribed to the spam blocking service, The extraction step is preferably performed when it is confirmed from the subscriber server that the subscriber has subscribed to the spam blocking service as a result of the subscription determination step.

As described above in detail, when the spam filtering system according to the present invention is used, a legitimate guidance message such as a guidance message in a financial institution or a guidance message sent from the government or a public institution is blocked In addition, it is possible to prevent the normal short message from being blocked, and as a result, the accuracy of spam filtering service spam discrimination is improved.

Hereinafter, a spam filtering system and a spam filtering method according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

1 is a schematic diagram showing a spam filtering system according to the present invention.

The calling terminal 100 generates a short message and transmits the short message to the called terminal 110 using the mobile communication network 200 as a terminal to which the short message is to be transmitted.

That is, the short message created by the calling terminal 100 is received by the receiving terminal 110 after passing through the short message center (SMS center) 300 through the communication network 200 and again through the communication network 200.

Meanwhile, after receiving the message from the mobile communication network 200, the short message service center 300 according to an embodiment of the present invention sends a message to the subscriber server 310 to allow the recipient, who is the owner of the called terminal, When it is confirmed from the subscriber server 310 that the called party has subscribed to the spam protection service, the information inquiring whether or not the corresponding short message has been spam, that is, information necessary for determining whether or not the short message is spam, And the Callback URL address inserted in the short message, and the like to the spam filtering server 400. Here, the subscriber server 310 mainly refers to a server that maintains subscriber information as a database, such as a home location register (HLR).

The subscriber server 310 is a basic equipment of a mobile communication network that allows a mobile communication subscriber to check the location of a mobile communication subscriber to receive a telephone call and at the same time grasps various information about the subscriber and controls various supplementary services such as calling, Whether or not the user has subscribed to the spam blocking service.

The input terminal 320 is a terminal of an organization previously authenticated by a communication service provider operating the filtering server 400, and is mainly a bank, a public institution, or a government. The preauthorized institution may register the legitimate message information including the content of the short message to be sent to a plurality of persons and the originating and returning numbers before sending the short message so as to prevent the messages from being blocked by the spam filtering system . Of course, it is a matter of course that the operator operating the spam filtering server 400 can directly input the legitimate message information.

The spam filtering server 400 includes a legitimate message input unit 410 and a spam filtering unit 420.

The legitimate message input unit 410 receives and stores legitimate message information from the input terminal 320. For example, data (return number, short message content) from the input terminal 320, and stores it in a built-in database. Meanwhile, the stored data is uploaded to the spam filtering unit 420 at regular intervals.

The spam filtering unit 420 receives and stores the stored legitimate message information from the legitimate message input unit 410. When the spam judgment information is received from the SMS center 300, It is determined whether or not it is included in the message information. If the judgment result is included, it is a legitimate message such as a guidance message that the previously authenticated input terminal 320 wants to send. Therefore, in this case, information indicating that the user is not spam is immediately sent to the SMS center 300 without having to go through the spam filtering process. In this case, the present message is transmitted to the called terminal 110 without fear of being filtered.

On the other hand, if the spam judgment information is not included in the pre-stored legitimate message information, it is determined whether or not the spam processing is performed through searching for whether a keyword indicating spam is included through the spam filtering process as before.

2 is a block diagram of a spam filtering server according to an embodiment of the present invention.

The spam filtering server 400 according to an embodiment of the present invention includes a legitimate message input unit 410 and a spam filtering unit 420 as described above

The legitimate message input unit 410 further includes an authentication unit 412, a legitimate message provisional DB 414, a legitimate message verification unit 416, and an uploading unit 418.

When the input terminal 320 accesses the spam filtering server 400, the authentication unit 412 determines whether the input terminal 320 is an authenticated terminal. In general, an ID and a password are inquired to the input terminal 320, and it is possible to determine whether the input terminal 320 is an authenticated terminal in response to the inquiry. However, the present invention is not limited thereto, and all the methods for certifying certificates and other terminals are possible.

The legitimate message provisional DB 414 stores the legitimate message information input by the input terminal 320. The legitimate message information may include any one of a calling number and a reply number and contents of a short message. For example, if the legitimate message information is composed of the reply number and the contents of the short message, a display window for inputting the reply number and the contents of the short message will be displayed on the input terminal 320, while the legitimate message temporary DB 414, Number, and the contents of the short message will be accumulated.

The legitimate message verification unit 416 performs verification and management of the legitimate message information stored in the legitimate message provisional DB 414. That is, even if a specific authority has given access to the spam filtering system, it does not always apply the legitimate message entered by the agency, but sometimes needs to be verified.

For example, the bank A gives access to the spam filtering server 400, but the bank A does not always send a necessary short message. The operator of the spam filtering server 400 may review the legitimate message stored in the legitimate message temporary DB and delete the legitimate message stored in the legitimate message temporary DB if the message is not really a necessary message. And so on.

The uploading unit 418 transmits the legitimate message information to the spam filtering unit at a predetermined time.

The spam filtering unit 420 includes a legitimate message DB 422 and a spam determination unit 424.

The legitimate message DB 422 stores the legitimate message information transmitted from the legitimate message input unit.

The spam determination unit 424 includes a general spam filtering function. That is, it performs a function of determining whether the corresponding message is spam or not by comparing specific information of the message, for example, the calling party number and the contents of the message. The present invention further includes a function of determining whether the legitimate message is included in the legitimate message DB 422 by comparing the legitimate message information included in the legitimate message DB 422 with the spam judgment information transmitted from the SMS center 300.

That is, before proceeding to a general spam judgment process, it is first determined whether it is a legitimate message, and if it is not a legitimate message, a general spam judgment process is performed.

3 is a flowchart illustrating a method for processing a spam SMS message according to an embodiment of the present invention.

An authenticated organization that wants to send a message such as a priority guide message accesses the filtering server 400 through its input terminal 320 and stores a legitimate message (S510). At this time, the filtering server 400 performs input only when the input terminal 320 is authenticated. Since a major government such as an authorized institution, that is, a government agency, can be changed from time to time, an administrator manages the authentication information of the input terminal 320 from time to time. Therefore, management of the authentication of the newly authenticated terminal is performed by adding authentication information (for example, an ID or a password or a unique number of the terminal) or deleting the authentication information.

The legitimate message information may include a calling number, a reply number, a short message content, and a Callback URL address embedded in a short message. Hereinafter, a reply number and a short message content will be used for convenience. The legitimate message information is stored in the legitimate message input unit 410 of the spam filtering server 400 (S515). In the legitimate message input unit, a database having two fields, i.e., a reply number and a message, is embedded, and the legitimate message information is continuously accumulated.

Then, the operator of the spam filtering server 400 verifies the legitimate message information and deletes the legitimate message information from the database if it is the content of the advertisement (S517).

The legitimate message information previously stored in the legitimate message input unit 410 is uploaded to the spam filtering unit 420 at predetermined intervals (S520). This step is not essential for maintaining the spam filtering unit 420 performing the conventional spam filtering function, but is a necessary process for placing the legitimate message input unit 410 physically. That is, it is needless to say that the spam filtering unit 420 and the legitimate message input unit 410 are not physically separated, and that the same database can be used together.

Thereafter, when the calling terminal 100 creates a short message, the short message is transmitted to the short message center 300 through the mobile communication network 200 at steps S530 and S535.

In step S540, the subscriber server determines whether the recipient of the message, that is, the called party who is the owner of the called terminal, has subscribed to the spam blocking service.

If it is confirmed that the called party has subscribed to the spam blocking service, spam determination information is extracted from the short message (S545). Here, the spam judgment information may be the SMS itself or may be a calling number, a reply number, a short message content included in the SMS message, a Callback URL address inserted in the SMS message, and the like. Hereinafter, for convenience of explanation, it is assumed that the reply number and the short message content are included.

The extracted spam judgment information is transmitted to the spam filtering unit 420 in the spam filtering server 400 (S550).

The spam filtering unit 420 compares the received spam judgment information with the previously stored legitimate message information to determine whether the message is a legitimate message (S560). That is, whether there is information corresponding to the summary number and the short message included in the spam judgment information, from among the pre-stored legitimate message information, and judges that it is not a legitimate message if there is matching information, and if it is not.

If the message is not a legitimate message, the general spam filtering step is performed (S570), and the determination result is transmitted to the SMS center (S580). Then, the SMS center 300 transmits a message through the mobile communication network to the incoming call terminal (S590, S595).

4 is a flowchart illustrating a method of processing a spam message according to an exemplary embodiment of the present invention.

First, the SMS center 300 receives the SMS from the calling terminal (S610).

Thereafter, the SMS center 300 checks whether the recipient of the message, that is, the receiver of the receiver terminal, has subscribed to the spam protection service (S620).

If the user does not subscribe to the spam blocking service (S620-N), the SMS is immediately transmitted to the called terminal (S690).

On the contrary, if it is confirmed that the called party has subscribed to the spam blocking service (S620-Y), the SMS extracts the spam judgment information including the reply number and the message content (S630).

The extracted spam judgment information is transmitted to the spam filtering server 400 (S635).

The spam filtering server 400 determines whether the spam judgment information is included in the legitimate message information (S640).

If it is included (S650-Y), the SMS message corresponds to the SMS sent after the authentication terminal stores the message as a legitimate message in advance, and immediately transmits the SMS message to the called terminal without a process such as spam filtering (S690).

If it is not included (S650-N), the spam filtering process is performed (S660). That is, it is determined whether or not the spam is determined by searching the keyword search and the sender black list with the reply number and the message contents included in the spam judgment information.

If it is determined that the spam is not spam (S670-N), SMS is transmitted to the called terminal (S690), and if it corresponds to spam (S670-Y), SMS blocking is performed (S680).

The spam filtering system and the spam filtering method using the spam filtering system for preventing the filtering of legitimate messages according to the preferred embodiment have been described.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

The spam filtering system and the spam filtering method using the spam filtering system according to the present invention prevent the filtering of legitimate short messages according to the present invention by filtering the spam in advance in the mobile communication network in the past, Conventional spam filtering techniques are used for simple filtering. However, this technique is a series of techniques for filtering a message that does not require a filtering step before being filtered. The present invention is not limited to a mobile communication system and a terminal device to which the present invention can be applied.

1 is a schematic diagram showing a spam filtering system according to the present invention,

2 is a block diagram of a spam filtering server according to an embodiment of the present invention;

3 is a flowchart illustrating a method for processing a spam message according to an exemplary embodiment of the present invention, and FIG.

4 is a flowchart illustrating a method of processing a spam message according to an exemplary embodiment of the present invention.

Description of the Related Art [0002]

100: calling terminal 110: called terminal

200: Mobile communication network 300: SMS message center

310: Subscriber server 400: Spam filtering server

410: legitimate message input unit 420: spam filtering unit

Claims (16)

delete delete delete Determining whether the message is a legitimate message based on the spam judgment information after receiving the spam judgment information corresponding to a message transmitted to the called terminal, If the message is a legitimate message, information indicating that the message is not a spam character is immediately transmitted to the message center. If the message is not a legitimate message, a spam filtering process is performed on the message to transmit the message to the message center. , And a function of receiving and storing legitimate message information from an input terminal, Judges whether the message is a legitimate message based on a result of comparison between the spam judgment information and the pre-stored legitimate message information, Wherein the spam filtering server performs a function of determining whether the input terminal is an authenticated terminal and receiving and storing the legitimate message information only when the input terminal is authenticated. delete The method of claim 4, wherein The spam filtering server A legitimate message input unit for receiving and storing legitimate message information from the input terminal; And Receiving the stored legitimate message information from the legitimate message input unit and storing the received legitimate message information, comparing the spam judgment information with the pre-stored legitimate message information to determine whether the message is a legitimate message, If the message is a legitimate message, information indicating that the message is not a spam character is immediately transmitted to the message center. If the message is not a legitimate message, a spam filtering process is performed on the message to transmit the message to the message center And a spam filtering unit. The method of claim 6, wherein The legitimate message input unit An authentication unit for determining whether the input terminal is an authenticated terminal; A legitimate message temporary DB storing the received legitimate message information; And And an uploading unit for transmitting the legitimate message information to the spam filtering unit at a predetermined time, The spam filtering unit A legitimate message DB for storing legitimate message information transmitted from the legitimate message input unit; And And a spam determining unit for comparing the legitimate message information included in the legitimate message DB with the spam judgment information to determine whether the legitimate message is a legitimate message and performing a spam filtering process on the message. The method of claim 7, wherein The legitimate message input unit And a legitimate message verifying unit for verifying and managing legitimate message information stored in the legitimate message provisional DB. 5. The method of claim 4, Wherein the spam judgment information includes any one of a calling number and a reply number extracted from the message and contents of the short message, Wherein the legitimate message information includes any one of a call number and a reply number input from the input terminal and contents of the short message, The spam filtering server Judges a legitimate message when the same data as the spam judgment information is included in the legitimate message information, and judges that it is not a legitimate message if the same data as the spam judgment information is not included in the legitimate message information Wherein the spam filtering server is a spam filtering server. Extracting spam determination information from the message center after the message center receives the message transmitted to the called terminal; The message center delivering the spam determination information to a spam filtering server; Determining whether the message is a legitimate message based on the spam determination information; And If the message is a legitimate message as a result of the legitimate message determination step, information indicating that the message is not a spam character is transmitted to the message center, Determining whether the spam message is a spam based on a result of the spam filtering process when the message is not a legitimate message; Further comprising a legitimate message input step in which the spam filtering server receives and stores legitimate message information from an input terminal, Wherein the legitimate message determination step determines whether the legitimate message is based on a result of comparing the spam judgment information and the stored legitimate message information, Further comprising an input terminal authentication step of determining whether the input terminal is an authenticated terminal, Wherein the legitimate message input step is performed only when the input terminal is authenticated. delete The method of claim 10, wherein Wherein the spam judgment information includes any one of a calling number and a reply number extracted from the message and contents of the short message, The legitimate message information A number of a caller number and a reply number input from the input terminal, and a content of a short message, The legitimate message determination step Judges a legitimate message when the same data as the spam judgment information is included in the legitimate message information, and judges that it is not a legitimate message if the same data as the spam judgment information is not included in the legitimate message information Wherein the spam filtering method comprises the steps of: delete 11. The method of claim 10, And a legitimate message information verification step of determining the stored legitimate message information. The method of claim 10, wherein When the message center receives information indicating that the message is not a spam character from the spam filtering server, transmits the message to the called terminal, and if the message center receives information indicating that the message is a spam character, The spam filtering method comprising: The method of claim 10, wherein Further comprising a blocking service subscription determining step of, after the message center receives the message, inquiring of the subscriber server whether the called party who is the owner of the called terminal has subscribed to the spam blocking service, Wherein the step of extracting spam determination information is performed when it is confirmed from the subscriber server as a result of the subscription determination step that the called party has subscribed to the spam blocking service.

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