JP2016053886A - Information device, information system, and method for evaluating access right - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain an information device that can set an access right to a specific folder for an appropriate range of user group.SOLUTION: An information device includes access-log acquisition means 1, group information acquisition means 2, and evaluation value calculating means 3. The access-log acquisition means 1 acquires data about the access log of a user having accessed to a specific folder. The group information acquisition means 2 acquires, as group information, information on the user group to which a user belongs. The evaluation value calculating means 3 calculates a predetermined evaluation value based on the access log and group information for each of a first user group and a second user group containing the first user group. The predetermined evaluation value indicates a suitability of a range where an access right to the specific folder is set.SELECTED DRAWING: Figure 1

Description

  The present invention relates to access right control in an information system, and more particularly to a technique for setting an access right within an appropriate range.

  With the development of the information society, a plurality of information systems, a plurality of file servers, and the like according to applications are used in an organization such as a company via a network. In many cases, an information system, a file server, and the like set restrictions on access to data and files by setting whether to access data and files, that is, access rights for each user or group. Also, in a file server or the like, access rights are often set on a folder basis, rather than setting access rights for each file. For example, when an access right is set on a folder basis or the like, the information system or file server sets the setting of the user having the access right as an ACL (Access Control List) and controls the access right to the folder.

  If each information system manages users, etc., it will be necessary to change user information settings for each information system when a user is added or deleted, or a group to which a user belongs is changed. . In order to eliminate such a setting change for each information system, a directory service that is a system that collectively manages users of the information system or the like may be used. In the directory service, user information, group information to which the user belongs, and the like are stored in a server device and the like, and user information is managed for each group. The information system and file server refer to the directory service information to determine the group to which the user belongs and determine whether access is possible. By adopting such a configuration, it is not necessary for the information apparatus and the file server to have user information, respectively, so that it is possible to suppress the amount of work required for changing information.

  Even when a directory service is used, an access right is not set for each folder, but a method of setting the same access right for a certain folder and all folders below it is often used. By adopting such a method, when a new folder is created below a certain folder, management according to the access right of the upper folder can be performed without setting a new access right. As a result, the amount of work required for setting access rights can be reduced, and folders and file updates can be made by individual users.

  However, the method of collectively setting access rights to lower folders according to the upper folder increases the range that individual users can freely access, and can often access unnecessary folders. Therefore, even when setting access rights to a folder in a batch, it is necessary to set access rights to a folder at an appropriate level. Therefore, in order to set an appropriate range of access rights to a predetermined folder while suppressing the amount of work such as setting changes, it is desirable that there is information that serves as a basis for determining access rights. For this reason, technology development is being carried out to obtain selection index information when selecting users and groups for setting access rights to folders and the like. As a technique for obtaining information on selection indexes of users and groups for setting access rights to data, folders, and the like, for example, a technique such as Patent Document 1 is disclosed.

  Patent Document 1 relates to an allocation device that allocates resources to roles that are user groups based on access log data. In Patent Document 1, a user belongs to a role that is a group divided for each attribute. The assigning device of Patent Literature 1 calculates a predetermined value for each combination of resource and role based on the access performance of the user belonging to the role to the resource. The predetermined value to be calculated is calculated so that the value increases as the number of users accessing the resource increases. If the allocation apparatus of patent document 1 calculates a predetermined value for every combination of a resource and a role, it will allocate a resource preferentially to the role with a large value when it sees for every resource. In Patent Document 1, it is assumed that by allocating resources as described above, appropriate resources can be allocated to roles, that is, user groups.

JP 2011-227579 A

  However, the technique of Patent Document 1 is not sufficient in the following points. The assigning device of Patent Document 1 calculates a predetermined value of a role that is a user group for each resource, and compares the predetermined value to determine a role to which resources are preferentially assigned. Therefore, an exclusive access right is given to one role for a resource in Patent Document 1. However, a file server or the like may be required to set an appropriate access right range for a predetermined folder. At that time, in a file server or the like, access rights may be set for a plurality of user groups for a predetermined folder. Therefore, the technique of Patent Document 1 cannot be used as a technique for setting an appropriate range of access rights to a predetermined folder in a file server or the like.

  An object of the present invention is to obtain an information device capable of setting access rights to a predetermined folder for a user group in an appropriate range.

  In order to solve the above problems, the information apparatus of the present invention includes an access log acquisition unit, a group information acquisition unit, and an evaluation value calculation unit. The access log acquisition means acquires access log data of a user who has accessed a predetermined folder. The group information acquisition unit acquires information on user groups to which the users belong as group information. The evaluation value calculation means calculates a predetermined evaluation value for each of the first user group and the second user group including the first user group based on the access log and the group information. The predetermined evaluation value indicates suitability as a range for setting an access right to a predetermined folder.

  The access right evaluation method according to the present invention acquires data of an access log of a user who has accessed a predetermined folder, and acquires information on user groups to which the user belongs as group information. Further, the access right evaluation method of the present invention provides a predetermined evaluation value for the first user group and the second user group including the first user group based on the access log and the group information. calculate. The predetermined evaluation value indicates suitability as a range for setting an access right to a predetermined folder.

  According to the present invention, an access right to a predetermined folder can be set for a user group in an appropriate range.

It is a figure which shows the outline | summary of a structure of the 1st Embodiment of this invention. It is a figure which shows the outline | summary of a structure of the 2nd Embodiment of this invention. It is a figure which shows the outline | summary of the apparatus structure in the 2nd Embodiment of this invention. It is a figure which shows a part of apparatus structure in the 2nd Embodiment of this invention. It is a figure which shows the outline | summary of the operation | movement flow in the 2nd Embodiment of this invention. It is a figure which shows the outline | summary of the operation | movement flow in the 2nd Embodiment of this invention. It is the figure which showed the calculation procedure in the 2nd Embodiment of this invention. It is the figure which showed the structure of the group in the 2nd Embodiment of this invention. It is the figure which showed the calculation procedure in the 3rd Embodiment of this invention. It is the figure which showed the structure of the group in the 3rd Embodiment of this invention.

(First embodiment)
A first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an outline of the configuration of the information apparatus of this embodiment. The information apparatus of this embodiment includes an access log acquisition unit 1, a group information acquisition unit 2, and an evaluation value calculation unit 3.

  The access log acquisition unit 1 acquires access log data of a user who has accessed a predetermined folder. The group information acquisition unit 2 acquires information on user groups to which each user belongs as group information. The evaluation value calculation means 3 calculates a predetermined evaluation value for each of the first user group and the second user group including the first user group based on the access log and the group information. The predetermined evaluation value indicates suitability as a range for setting an access right to a predetermined folder.

  In the information apparatus according to the present embodiment, the access log acquisition unit 1 acquires access log data of a predetermined folder, and the group information acquisition unit 2 acquires information on a user group to which a user who has accessed the predetermined folder belongs. Yes. Further, the evaluation value calculation means 3 calculates a predetermined evaluation value based on the access log and group information. The evaluation value calculation means 3 calculates a predetermined evaluation value for the first user group and the second user group including the first user group. By calculating a predetermined evaluation value by such a method, which of the first user group and the second user group having a wider range than the first user group is suitable as the access right setting range is determined. The index shown can be obtained. As a result, by using the information apparatus of this embodiment, it is possible to set the access right to a predetermined folder for a user group in an appropriate range.

(Second Embodiment)
A second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 shows an outline of the configuration of the information system of this embodiment. The information system of the present embodiment includes a terminal device 10, an access right evaluation device 20, a user management device 30, and a storage device 40. Each device is connected to each other via a communication line. A plurality of storage devices 40 may be provided.

  The terminal device 10 has a function as an information terminal device in which an operator performs operations such as setting access rights to folders and files in the storage device 40. The terminal device 10 includes a setting unit 11, an access right candidate request unit 12, and a storage device access unit 13. The terminal device 10 may have a function as an information terminal device that refers to a file stored in the storage device 40 and processes data in the file.

  The setting unit 11 has a function of receiving data input from an operator and transmitting information to other parts, and a function of displaying information on setting items necessary for the operation of the information system, processing results, and the like. The setting unit 11 includes an input device and a display device. The input device and the display device may be formed integrally with the terminal device 10, or at least one of them may be provided independently and connected to the terminal device 10 by a signal cable or a wireless communication line. Good.

  The setting unit 11 sends data input or selected by the operator using the input device to another part. In the setting unit 11, an operator performs selection of a folder to be set as an access right and setting an access right to the folder based on access right candidate information. The setting unit 11 displays information necessary for the operator to input setting items on the display device when the access right is set. The setting unit 11 displays the optimal access right candidate sent from the access right evaluation device 20 on the display device. When the terminal device 10 is used as an information terminal device for referring to or processing file data, the setting unit 11 serves as an input device and a display device that are required when the worker refers to or processes file data. It has the function of.

  The access right candidate request unit 12 has a function of requesting access right candidate information from the access right evaluation device 20. Further, the access right candidate request unit 12 has a function of receiving access right candidate information from the access right evaluation device 20 and sending it to the setting unit 11. The access right candidate request unit 12 sends the access right setting information sent from the setting unit 11 and information such as the target folder to the access right evaluation device 20 as an access right candidate request signal S1. Further, the access right candidate request unit 12 sends to the setting unit 11 information on a group that is a candidate for setting the access right that is sent as the access right evaluation data signal S6 and information on a predetermined evaluation value for each user group. .

  The storage device access unit 13 has a function of requesting setting of access rights to folders and files stored in the storage device 40. The storage device access unit 13 sends information on a folder or file for which an access right is set and information on a user group for setting the access right to the storage device 40 as an access right setting request signal S7. When the terminal device 10 is used as an information terminal device, the storage device access unit 13 performs processing such as writing and reading of each data stored in the file server based on the operation of the operator in the setting unit 11. It has a function to perform.

  The access right evaluation device 20 generates information on candidate user groups for setting access rights and information on predetermined evaluation values for each user group when setting access rights to folders and files in the information storage device 40. Have The predetermined evaluation value is set as an index indicating how suitable each user group is as a range for setting access rights to folders and files. The access right evaluation device 20 includes a request processing unit 21, an access right candidate determination unit 22, an access log totaling unit 23, and a total data storage unit 24.

  The request processing unit 21 has a function of receiving a request for an access right candidate sent from the terminal device 10. Further, the request processing unit 21 has a function of transmitting to the terminal device 10 information on candidate user groups for access rights and information on predetermined evaluation values for each user group. The request processing unit 21 extracts information on a folder or file for which an access right is set from the access right candidate request signal S1 received from the terminal device 10. The request processing unit 21 sends information on folders and files for which access rights are set to the access log totaling unit 23 and the access right candidate determining unit 22. In addition, the request processing unit 21 receives the information on the candidate user group for setting the access right, the information on the predetermined evaluation value for each user group, and the information on the target folder received from the access right candidate determination unit 22. The evaluation data signal S6 is sent to the terminal device 10.

  The access right candidate determining unit 22 has a function of generating group information that is an access right candidate and information on a predetermined evaluation value for each group. When setting access to a folder or file requested from the terminal device 10, the access right candidate determining unit 22 generates information on a group that is a candidate for setting an access right.

  In the present embodiment, the access right candidate determination unit 22 includes a minimum unit user group stored in the user management device 30 and a user group higher than a plurality of user groups as a candidate user group for setting access rights. To do. Further, the access right candidate determining unit 22 also sets a user group that is generated by a combination of a plurality of user groups as a user group candidate for setting the access right. That is, the access right candidate setting unit 22 according to the present embodiment calculates a predetermined evaluation value using all combinations of user groups generated from each user group stored in the user management apparatus 30 as access right setting candidates. The target of.

  The access right candidate determination unit 22 calculates a predetermined evaluation value indicating whether the access right is set as the range for setting the access right for each candidate user group for setting the access right. The access right candidate determination unit 22 determines the candidate user group based on the total data of the access log stored in the storage device 40 stored in the total data storage unit 24 and the information on the total number of user groups and the group to which the user belongs. Information is generated and a predetermined evaluation value is calculated. Further, the access right candidate determination unit 22 of this embodiment corresponds to the group information acquisition unit and the evaluation value calculation unit 3 of the first embodiment.

  The access right candidate determination unit 22 obtains user group information and user group information from the user management apparatus 30. The access right candidate determination unit 22 sends a user group information and a signal requesting information on the group to which the user belongs to the user management apparatus 30 as a group information request signal S4. Further, the access right candidate determination unit 22 receives the information on the total number of user groups and the information on the user group to which the user belongs as a group information signal S5. A method for calculating the predetermined evaluation value will be described later.

  The access log totaling unit 23 has a function of totaling the number of accesses to files stored in the information storage unit 42 of the storage device 40 based on access log data stored in the storage device 40. The access log totaling unit 23 sends a signal requesting access log data to a file stored in the information storage unit 42 to the storage device 40 as an access log request signal S2. Further, the access log totaling unit 23 receives access log data transmitted from the storage device 40 as access log data S3. The access log totaling unit 23 extracts user information from the received access log, and stores the totaled data totaled for each folder in the total data storage unit 24. Further, the access log totaling unit 23 of the present embodiment corresponds to the access log acquisition unit 1 of the first embodiment.

  The total data storage unit 24 has a function of storing data obtained by totaling access logs for each folder in the information storage unit 42 of the information storage device 40. The total data storage unit 24 stores an access log for each folder that is totaled by the access log total unit 23.

  The user management device 30 is constituted by an information processing device such as a server device, and has a function as a directory service. The user management apparatus 30 stores information on each user and information on a user group to which the user belongs. The user management apparatus 30 stores information on each user for each user group. The user group information forms a directory structure. The user management device 30 stores information on almost all users belonging to a group of a plurality of users such as a company and one business division of the company.

  FIG. 3 shows an example of user group and user data stored in the user management apparatus 30 of this embodiment having a function as a directory service. In the example of FIG. 3, two user groups “XX section” and “YY section” and a user “development manager” belong to the user group “development department”. In the example of FIG. 3, 20 users belong to the user group “XX section”, and 14 users belong to the user group “YY section”. Therefore, in the example of FIG. 3, 35 users belong to the user group “development department”. In addition, a user group called “Company X in charge of project” independent of the “development department” includes two users “Hanako Development” and “Taro Development” who belong to the “XX Section”.

  In the example of FIG. 3, it is assumed that “XX section” is a first user group, and “development department” including the first user group is a second user group. At this time, the access right evaluation device 20 of the present embodiment calculates the respective predetermined evaluation values as candidates for setting the access right for the second user group as well as the first user group. In the information system of the present embodiment, by comparing predetermined evaluation values between user groups having different ranges as described above, it is possible to obtain information on an appropriate setting range of access rights set in a predetermined folder.

  The storage device 40 has a function of saving data files and the like in a hierarchical folder. The storage device 40 includes an access log storage unit 41 and an information storage unit 42.

  The access log storage unit 41 has a function of storing, as an access log, information on users who have accessed each file in the information storage unit 42. The access log storage unit 41 stores information terminals used together with information on users who have accessed files, information on the date and time of access, and details of operations performed in association with each other. The operation performed on the file refers to an operation performed on the file by the user, for example, referring to, updating, deleting, creating and moving the file. Further, when the access log storage unit 41 receives the access log request signal S2 from the access right evaluation device 20, the access log storage unit 41 sends the access log data to the access right evaluation device 20 as an access log data signal S3.

  The information storage unit 42 includes a storage device such as a hard disk and has a function of storing a plurality of files. Each file is stored in one of the folders, and each folder has a hierarchical structure as necessary. FIG. 4 shows an example of folders and files stored in the information storage unit 42 of the present embodiment. In the example of FIG. 4, there are three folders of “development department”, “sales department”, and “personnel department”. In addition, two folders of “X company PJ” and “estimate” are subordinate to the “development department” folder. In the example of FIG. 4, a file “contract” .ppt is stored in the folder “X company PJ”. In addition, a file “estimate.doc” is stored in the “estimate” folder. As described above, the information storage unit 42 stores folders and files in a hierarchical manner.

  When there is an access to each stored file, the information storage unit 42 stores the access log in the access log storage unit 41. In addition, the information storage unit 42 stores information on access rights in file units or folder units, and permits access only from users belonging to groups having access rights. The information storage unit 42 determines the group to which each user belongs by referring to the directory service of the user management device 30.

  In the access right setting information, information on whether or not access is possible from a user or group is set for each file or folder. The access right to the hierarchical folder can be set so that the same access right can be obtained for a folder and a file included in the folder from a certain hierarchy. In addition, when the information storage unit 40 receives the access right setting request signal S7 from the terminal device 10, the information storage unit 40 updates the access right information based on the received information.

  In the information system of this embodiment, an operation when an access right is set for a folder or the like stored in the storage device 40 will be described. FIG. 5 and FIG. 6 show an outline of an operation flow when the access right is set in the information system of this embodiment.

  First, an operation when an access log to a file in the storage device 40 is saved and access log information is accumulated will be described. Any file in the information storage unit 42 of the storage device 40 is accessed from the terminal device 10 or another information processing device. Here, it is assumed that the information storage unit 42 is accessed from the terminal device 10 and the “estimation.doc” illustrated in FIG. 4 is referred to. When the user of the terminal device 10 has an access right, information such as the identification information of the accessed user, the access date and time, and the reference operation is stored in the access log storage unit 41. When the user of the terminal device 10 does not have access right, an error of insufficient authority occurs and the user of the terminal device 10 cannot access “Estimation.doc”. When an insufficient authority error occurs, information on the occurrence of an insufficient authority error is stored in the access log storage unit 41 together with user identification information, access date / time, and reference operation information as the access in which the error occurred.

  Next, an operation when an access right is set to a predetermined folder stored in the storage device 40 will be described. In the setting unit 11 of the terminal device 10, a folder for which an access right is set is designated by an operator or the like (step 101). The access right may be set for each file. In this embodiment, when a certain folder is selected, all lower folders and files are set as access right setting targets. When a folder for which an access right is to be set is specified by the operator, the setting unit 11 sends information on the folder for which the access right is set to the access right candidate requesting unit 12. Upon receiving the information on the target folder, the access right candidate requesting unit 12 evaluates the access right as an access right candidate request signal S1 with a request for information on the user group candidate for setting the access right together with the information on the target folder. Send to device 20 (step 102).

  When the access right candidate request signal S1 is received by the request processing unit 21, the access right evaluation device 20 starts an operation of generating information on user groups that are candidates for setting access rights and evaluation information for each user group. Upon receiving the access right candidate request signal S 1, the request processing unit 21 sends information on the folder designated by the received signal to the access right candidate determining unit 22 and the access log totaling unit 23. When the access log totaling unit 23 receives the information about the folder for which the access right is set, the access log totaling unit 23 starts collecting the access log data of the target folder (step 103).

  When the access log collection is started, the access log totaling unit 23 sends a signal requesting access log data of the folder whose access right is to be set to the storage device 40 as an access log request signal S2 (step 104).

  Upon receiving the access log request signal S2, the access log storage unit 41 of the storage device 40 sends the access log data of the folder designated by the received signal to the access right evaluation device 20 as the access log data signal S3 (step 105). .

  When the access log totaling unit 23 receives the access log data signal S3 from the storage device 40, the access log totaling unit 23 extracts information about a user who has accessed the target folder from the access log data. When the user information is extracted from the access log, the access log totaling unit 23 totals the information of users who have a history of access (step 106). When the target folder is hierarchized, the access log totaling unit 23 totals user information for each folder. When the access log totaling unit 23 totals the access log data, it stores the totaled data in the total data storage unit 24.

  When the total data of the access log is stored, the access right candidate determination unit 22 starts collecting information on user groups that can be formed and information on user groups to which each user belongs (step 107). . The access candidate determination unit 22 sends a signal requesting user group information and user group information to which each user belongs to the user management apparatus 30 as a group information request signal S4 (step 108).

  Upon receiving the group information request signal S4, the user management apparatus 30 uses the group information signal S5 as information on the group that can be formed from the stored user groups and the information on the user group to which the user belongs as an access right candidate The data is sent to the determination unit 22. The group information that can be formed from the stored user groups refers to information related to a group configured by a combination of user groups stored in the user management apparatus 30. Group information that can be formed from saved user groups is referred to as group information. The group information includes information on combinations of user groups and information on the total number N of groups formed in combination.

  When receiving the group information signal S5, the access right candidate determining unit 22 temporarily stores the user group information included in the group information. Further, the access right candidate determination unit 22 stores the information on the user group to which the user belongs in association with the access log information of each user stored in the total data storage unit 24.

  When obtaining the group information, the access right candidate determining unit 22 calculates a predetermined evaluation value for each user group (step 110). A method for calculating the predetermined evaluation value will be described later. When the predetermined evaluation value for each group is calculated for the N user groups, the access right candidate determination unit 22 obtains information on the candidate user group and information on the predetermined evaluation value for each user group as the request processing unit 21. Send to. Upon receiving information such as a predetermined evaluation value, the request processing unit 21 sends the received information to the terminal device 10 as an access right evaluation data signal S6 (step 111).

  Upon receiving the access right evaluation signal S6, the access right request unit 12 of the terminal device 10 transmits information such as an evaluation result for each user group included in the received signal to the setting unit 11. When the setting unit 11 receives information such as an evaluation result for each user group, the setting unit 11 displays a user group as a candidate for setting an access right and information on a predetermined evaluation value for each user group on a display device. Display of user groups that are candidates for setting access rights may be performed in the order of higher evaluation values, or may be performed only for user groups with evaluation values equal to or higher than a predetermined reference value.

  The worker refers to the display of the setting unit 11 and selects a user group for setting the access right (step 112). When a user group is selected, the setting unit 11 sends information on the selected user group to the storage device access unit 13. Upon receipt of the information on the selected user group, the storage device access unit 13 stores a signal requesting the selected user group to set the access right to the target folder as the access right setting request signal S7. The data is sent to the device 40 (step 113).

  Upon receipt of the access right setting request signal S7, the information storage unit 42 of the storage device 40 sets the access right to the target folder in the user group included in the received signal (step 114). When the access right is set, the information storage unit 42 is in a state where the user belonging to the user group for which the access right is set is permitted to access the target folder. As described above, in the information system of this embodiment, the operation for setting the access right to the folder or the like stored in the storage device 40 is completed.

  Next, a method for calculating a predetermined evaluation value will be described. FIG. 7 shows an outline of an operation flow when the access right evaluation device 20 of the present embodiment calculates a predetermined evaluation value for each user group.

  The access right candidate determination unit 22 of the access right evaluation device 20 acquires information on users who have a history of accessing files in the designated folder. In addition, the access right candidate determination unit 22 acquires group information from the user management device 30. In the present embodiment, it is assumed that information of N groups is acquired. N is an integer of 2 or more.

  The access right candidate determination unit 22 starts to calculate a predetermined evaluation value of the first (n = 1) group of the N user groups (step 121). The order in which the predetermined evaluation values are calculated in the N groups can be, for example, the order of data sent from the user management apparatus 30. The order in which the predetermined evaluation values are calculated may follow other criteria. Since the state immediately after the start, that is, n = 1 is No in Step 122, the operation from Step 123 is performed. The access right candidate determining unit 22 calculates the excess access right rate α (step 123).

  The excessive access rate α indicates the proportion of people who do not access the target folder among the number of people belonging to the user group. In this embodiment, the excess access rate α is calculated as α = 1− (a ÷ (a + c)). Here, a indicates the number of users belonging to the nth user group among users who have successfully accessed the target folder. c indicates the number of users other than a among the users belonging to the nth user group. The excess access right rate α indicates that the number of people who do not access the target folder is large even though the access right is set closer to 1. That is, as the excess access right rate α is closer to 0, the range of users included in the nth user group is more appropriate for setting access rights to the target folder.

  When the excess access right rate α is calculated, the access right candidate determination unit 22 calculates the access right cover rate β (step 124). The access right coverage ratio β is calculated as β = a ÷ (a + b). b indicates the number of users who do not belong to the nth user group among the users who have successfully accessed the target folder.

  As the access right coverage β is a value close to 0, when the access right is set for the user group, the number of users who cannot access the target folder even though the access right is set is increased. That is, the access right coverage ratio β indicates that the closer to 1, the more users who have access history, the more users can continue to access the target folder.

  As described above, it is possible to set an appropriate access right by setting the access right to a group in which both the values of 1-α and β are close to 1. That is, by selecting a group in which both the values of 1-α and β are close to 1, it is possible to set an access right to a necessary user without giving an access right excessively. In the information system according to the present embodiment, by calculating a predetermined evaluation value based on the excess access rate α and the access right cover rate β, it is possible to obtain necessary users while suppressing excessive access rights from being set. It can be included in the scope of access rights.

  Further, the order of calculating the excess access right rate α and the access right cover rate β, that is, the order of steps 123 and 124 may be reversed.

  FIG. 8 schematically shows what set a, b, and c represent. As shown in FIG. 8, the set a is a set of users who belong to both the set of all users in the nth user group and the set that has successfully accessed the target folder. Further, in FIG. 8, the set b is shown as a set obtained by removing a from the set that has successfully accessed the target folder. Similarly, in FIG. 8, it is shown that the set of c is a set obtained by removing a from the set of all users of the nth user group.

  When the excess access right rate α and the access right cover rate β are calculated, the access right candidate determination unit 22 calculates a harmonic average and calculates it as a predetermined evaluation value (step 125). The access right candidate determination unit 22 calculates the harmonic average A of 1-α and β, and sets the value of the harmonic average A as a predetermined evaluation value. The harmonic average A can be calculated as A = (2 × (1−α) × β) / ((1−α) + β). In the present embodiment, the closer the predetermined evaluation value calculated as the harmonic average is to 1, the more suitable the user group is as the setting range of the access right to the target folder. The predetermined evaluation value may be calculated by a method other than the harmonic average.

  When the predetermined evaluation value is calculated in step 125, the access right candidate determination unit 22 increments n by 1 (step 126), returns to step 122, and calculates the predetermined evaluation value of the next group. When the calculation of the predetermined evaluation values for all N groups is completed and the result in step 122 is Yes, the access right candidate determination unit 22 completes the operation for calculating the predetermined evaluation values.

  A method for calculating a predetermined evaluation value will be described by taking as an example the case of setting an optimal access right for the “X Company PJ” folder in FIG. 4 when a group as shown in FIG. 3 is set. In addition, it is assumed that the access right is set in advance for the user of the user group “X company project” in FIG. 3 in the folder “X company PJ” in FIG.

  3 and 4, the excess access rate α of the “development department” group is α = 1− (2 ÷ 35) ≈0.94. At this time, out of the number of users who have successfully accessed the target folder, a indicating the number of users belonging to the nth user group is also registered in the “X company project” user group. Two people. Also, c, which is a value indicating the number of users other than a among the users belonging to the nth user group, is 33 people.

  Further, the access right coverage ratio β is β = 2 ÷ 2 = 1. At this time, b indicating the number of users who do not belong to the nth user group among the users who have successfully accessed the target folder is zero. Therefore, when the harmonic average A is calculated as the predetermined evaluation value, A = (2 × (1−0.94) × 1) ÷ ((1−0.96) +1) ≈0.11.

  Next, when a predetermined evaluation value in the current setting is calculated, the excess access rate α of the group “in charge of company X project” is α = 1− (2 ÷ 2) = 0. Further, the access right cover ratio β is β = 2 ÷ 2 = 1. Therefore, when the harmonic average A is calculated as the predetermined evaluation value, A = (2 × (1-0) × 1) ÷ ((1-0) +1) = 1. Comparing the “Development Department” and “Company X Project Manager” groups, “Company X Project Manager” has a higher evaluation value and “X Company Project Manager” has access to the target folder. Suitable as a group for setting rights.

  In the information system of this embodiment, a new user group may be generated in the user management apparatus 30 based on a predetermined evaluation value of the user group. For example, when a user group with a high predetermined evaluation value is a combination of user groups, the user group after combination may be registered as a new user group. In addition, when the operator selects a user group on the terminal device 10, a group having the same content as the user group selected by the user management device 30 may be registered as one user group.

  In the information system according to the present embodiment, the access right evaluation device 20 determines a predetermined value for each user group based on the user group information managed by the user management device 30 and the access log information stored in the storage device 40. The evaluation value is calculated. The predetermined evaluation value is also calculated for a user group generated by combining individual user groups stored in the user management device 30.

  By comparing a predetermined evaluation value as a predetermined evaluation value based on the user's access record to a predetermined folder and the like, an index as to whether it is suitable as an access right setting range is compared between candidate user groups. Is possible. At that time, a predetermined evaluation value can be compared between a certain user group and a wider range of user groups including the user group. Therefore, in the information system of this embodiment, it is possible to determine the setting range of the appropriate access right to a predetermined folder based on information as a predetermined evaluation value for each user group. As a result, by using the information system of this embodiment, it is possible to set the access right to a predetermined folder for a user group in an appropriate range.

(Third embodiment)
The third embodiment of the present invention will be described in detail. In the second embodiment, a user who has no access right and cannot access the target folder is not considered when setting the access right. In this embodiment, the access right is set in consideration of the access history of the user who does not have the access right.

  The configuration of the information system of this embodiment is the same as that of the second embodiment. Therefore, hereinafter, the operation of the information system of this embodiment will be described with reference to FIG. 2 showing the configuration of the information system. Moreover, operations other than the step of calculating a predetermined evaluation value among the operations of the information system of the present embodiment are the same as steps 101 to 114 in the second embodiment. Therefore, only the operation for calculating the predetermined evaluation value will be described below. FIG. 9 shows an outline of an operation flow when the access right evaluation device 20 of the present embodiment calculates a predetermined evaluation value for each user group.

  The access right candidate determination unit 22 starts calculating a predetermined evaluation value of the first user group (n = 1) (step 131). When n = 1, since the result is No in Step 132, the operation from Step 133 is performed. The operation from step 133 when calculating a predetermined evaluation value of the nth user group will be described below.

  When the access right candidate determination unit 22 starts to calculate a predetermined evaluation value of the nth user group among the N user groups, the access right candidate determination unit 22 calculates the excess access right rate α for the nth user group (step 133). When the excess access right rate α is calculated, the access right candidate determination unit 22 calculates the access right cover rate β (step 134). The calculation method of the excess access right rate α and the access right cover rate β is the same as in the second embodiment.

  After calculating the excess access right rate α and the access right cover rate β, the access right candidate determination unit 22 calculates the cover rate γ of the user who has failed to access (step 135). The coverage rate γ of users who have failed to access is calculated as γ = e ÷ (e + d). Here, d indicates the number of users who do not belong to the nth user group among the users who failed to access the target folder. Also, e indicates the number of users belonging to the nth user group among users who failed to access the target folder. In other words, as the coverage rate γ of users who have failed to access becomes closer to 1, the number of users who have failed to access can access the target folder when the nth user group is set. Indicates.

  FIG. 10 shows an outline of what set a, b, c, d, and e represent. As shown in FIG. 10, the set of e is a set of users who belong to both the set of all users in the nth group and the set that has failed to access the target folder. Further, in FIG. 10, the set of d is shown as a set obtained by removing e from the set in which access to the target folder has failed. a, b and c are the same as those in the second embodiment.

  When the coverage rate γ of the user who has failed to access is calculated, the access right candidate determination unit 22 calculates a harmonic average to calculate a predetermined evaluation value (step 136). In the present embodiment, the predetermined evaluation value is calculated as a harmonic average A of the excess access right rate α, the access right cover rate β, and the access rate γ of the user who has failed to access. Also in this embodiment, a user group having a harmonic average A value closer to 1 is more suitable as a user group for setting an access right to a target folder.

  The harmonic average A can be calculated as A = (3 × (1−α) × β × γ) / ((1−α) × β) + β × γ + (1−α) × γ)). A value other than the harmonic average may be used as the predetermined evaluation value.

  When the predetermined evaluation value of the nth group is calculated, the access right candidate determination unit 22 increments n by 1 (step 137), returns to step 132, and calculates the predetermined evaluation value of the next user group. . When the calculation of the predetermined evaluation values for all N user groups has been completed and the result in step 132 is Yes, the access right candidate determination unit 22 completes the operation for calculating the predetermined evaluation values. When the calculation of the predetermined evaluation value is completed, the access right is set as in the second embodiment.

  The information system according to the present embodiment, when calculating a predetermined evaluation value indicating suitability as a range for setting an access right to a predetermined folder, has failed to access the predetermined folder without having the access right. This data is also used. Therefore, it is possible to calculate a predetermined evaluation value including a user group to which a user who cannot be accessed before reviewing the access right setting. As a result, the information system of the present embodiment can obtain more appropriate information on the setting range of access rights than the information system of the second embodiment.

  In the second and third embodiments, only user groups to which users who have a history of accessing the target folder belong may be included in the N user groups for calculating the predetermined evaluation value. That is, a user group consisting of only users who have no history of accessing the target folder may be excluded from the setting of N user groups for calculating a predetermined evaluation value. By restricting to the user group to which the user who has a history of accessing the target folder belongs, only the user who has the history of accessing the target folder has the same access rights as the directory service is configured. Is set. With such a configuration, when a predetermined evaluation value is calculated, in order to prevent many user groups with low evaluation values from being present, more appropriate access rights can be set based on the predetermined evaluation value. It becomes possible. Moreover, since the number of user groups for which a predetermined evaluation value is calculated can be suppressed, the processing amount in the access right evaluation device can be suppressed.

  In the second and third embodiments, the terminal device, the access right evaluation device, the user management device, and the storage device are shown as independent devices, but a combination of some devices or all of them are formed as one device. May be. In addition, when a plurality of storage devices are provided, some of the storage devices may be provided in the same casing as other devices such as a user management device.

  In the second and third embodiments, each process performed in each part of the terminal device, the access right evaluation device, the user management device, and the storage device may be performed by a computer program. For example, each processing performed in the access right evaluation device 20 can be performed by executing a computer program stored in the hard disk using a central processing unit or a semiconductor storage device on the server device. In addition, the computer program used for each process can be transmitted to each device via a telecommunication line or the like. The computer program used for each process can be stored in a magnetic storage device, a magneto-optical disk, a magnetic tape, and other storage media for use or distribution.

DESCRIPTION OF SYMBOLS 1 Access log acquisition means 2 Group information acquisition means 3 Evaluation value calculation means 10 Terminal apparatus 11 Setting part 12 Access right candidate request part 13 Storage device access part 20 Access right evaluation apparatus 21 Request processing part 22 Access right candidate determination part 23 Access log Aggregation unit 24 Total data storage unit 30 User management device 40 Storage device 41 Access log storage unit 42 Information storage unit 101-114 Step of access right setting operation 121-126 Step of calculating predetermined evaluation value 131-137 Predetermined evaluation Value calculation step S1 Access right candidate request signal S2 Access log request signal S3 Access log data signal S4 Group information request signal S5 Group information signal S6 Access right evaluation data signal S7 Access right setting request signal

Claims (10)

An access log acquisition means for acquiring access log data of a user who has accessed a predetermined folder;
Group information acquisition means for acquiring, as group information, information on user groups to which each of the users belongs;
Based on the access log and the group information, a predetermined evaluation value indicating suitability as a range for setting an access right to the predetermined folder is stored in the first user group and the first user group. An evaluation value calculating means for calculating each of the second user group including the information group. The evaluation value calculation means includes
A first evaluation value calculated based on a ratio of users belonging to the user group that calculates the predetermined evaluation value among all users who have accessed the predetermined folder;
Calculating a second evaluation value calculated based on a percentage of users accessing the predetermined folder among users belonging to the user group that calculates the predetermined evaluation value;
The information device according to claim 1, wherein the predetermined evaluation value is calculated based on the first evaluation value and the second evaluation value. The evaluation value calculation means includes
A high percentage of users who belong to the user group that calculates the predetermined evaluation value among users who have accessed the predetermined folder,
And,
When the percentage of users who accessed the predetermined folder among users belonging to the user group that calculates the predetermined evaluation value is high,
3. The information apparatus according to claim 2, wherein the predetermined evaluation value is calculated by a predetermined method such that the predetermined evaluation value is increased. The access log acquisition means also acquires an access log of a user who could not access the predetermined folder,
The evaluation value calculation means calculates a third value calculated based on a ratio of users belonging to the user group that calculates the predetermined evaluation value among all users who have not been able to access the predetermined folder. The evaluation value is further calculated, and the predetermined evaluation value is calculated based on the first evaluation value, the second evaluation value, and the third evaluation value. The information device described in 1.   The evaluation value calculation means calculates the predetermined evaluation value only for a user group having a record in which the user belonging to the group has accessed the predetermined folder in the access log. Item 6. The information device according to any one of Items 1 to 5. An information device according to any one of claims 1 to 5,
A storage device having at least means for storing data in a plurality of folders, and means for recording an access log to the folder;
A user management device that manages a directory for each user group to which a plurality of users belong;
The access log acquisition means of the information device acquires the access log from the storage device;
A group information acquisition unit of the information device acquires the group information from the user management device. An access log acquisition process for acquiring access log data of a user who has accessed a predetermined folder;
A group information acquisition process for acquiring, as group information, information on user groups to which each of the users belongs;
Based on the access log and the group information, a predetermined evaluation value indicating suitability as a range for setting an access right to the predetermined folder is stored in the first user group and the first user group. The computer program characterized by performing the evaluation value calculation process respectively calculated about the 2nd user group containing. The evaluation value calculation process includes:
A first evaluation value calculated based on a ratio of users belonging to the user group that calculates the predetermined evaluation value among all users who have accessed the predetermined folder;
Calculating a second evaluation value calculated based on a percentage of users accessing the predetermined folder among users belonging to the user group that calculates the predetermined evaluation value;
8. The computer program according to claim 7, wherein the predetermined evaluation value is calculated based on the first evaluation value and the second evaluation value. Get access log data of users who have accessed a given folder,
Obtaining information of user groups to which the users belong respectively as group information;
Based on the access log and the group information, a predetermined evaluation value indicating suitability as a range for setting an access right to the predetermined folder is stored in the first user group and the first user group. An access right evaluation method comprising: calculating each of the second user group including the second user group. A first evaluation value calculated based on a ratio of users belonging to the user group that calculates the predetermined evaluation value among all users who have accessed the predetermined folder;
Calculating a second evaluation value calculated based on a percentage of users accessing the predetermined folder among users belonging to the user group that calculates the predetermined evaluation value;
The access right evaluation method according to claim 9, wherein the predetermined evaluation value is calculated based on the first evaluation value and the second evaluation value.

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