JP2008077236A - Recording medium, document processor and document processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage medium and a document processor for authenticating a user without using an external device, and for enabling a specific user to browse electronic document or distributing it to the specific user. <P>SOLUTION: A recording medium is read by an external device equipped with a display part such as a computer, and when a user tries to browse document information owned by an electronic document, each program embedded in the electronic document is executed on the external device according to the operation of the user. Thus, user authentication is executed, and control relating to the display of the document information is operated based on the result by the processing of each program. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic document authentication function.

  Japanese Patent Laid-Open No. 2001-256190 (Patent Document 1) describes an electronic document management system such as a domain that is different from the domain to which the electronic document management system belongs and has no trust relationship, or a platform different from the platform to which the electronic document management system belongs. An invention related to an electronic document management technique is disclosed in which an electronic document can be accessed with the authority of a user account managed on a system in which direct user authentication cannot be performed.

Japanese Patent Laid-Open No. 2003-6028 (Patent Document 2) discloses a scrambled document that is a scrambled document obtained by scrambled a normal electronic document and can be displayed in a readable manner on a display when unscrambled. Such an invention is disclosed.
JP 2001-256190 A Japanese Patent Laid-Open No. 2003-6028

  However, in the invention disclosed in Patent Document 1, in accessing an electronic document, it is necessary to perform user authentication via a network in an already established electronic document management system. Further, the invention described in Patent Document 2 has a problem in that an electronic document once subjected to unscramble processing is viewed by an unspecified number of users.

  The present invention has been made in order to solve these problems, and is capable of user authentication without using an external device and can be browsed and distributed only to a specific user. An object of the present invention is to provide a storage medium and a document processing apparatus.

  In order to achieve the above object, the storage medium of the present invention employs the following configuration.

  According to another aspect of the present invention, there is provided a storage medium storing authentication data for authenticating a user, document information data including text data and / or image data, an authentication program, and a document concealment control program. Can authenticate a user based on the authentication data, and the document concealment control program can perform concealment control of the document information based on a result of executing the authentication program.

  According to the storage medium, user authentication can be performed without using an external device, and only a specific user can view and distribute.

  In order to achieve the above object, the storage medium of the present invention further includes the authentication data embedded in the storage medium, document identification data for identifying the document information embedded in the storage medium, and the storage medium. A password corresponding to the document identification data can be used.

  User authentication is performed based on the authentication data.

  In order to achieve the above object, the storage medium according to the present invention further determines whether the authentication program matches document identification data embedded in the storage medium with document identification data acquired from the outside. A configuration for executing an identification data determination procedure for determining, a password determination procedure for determining whether a password corresponding to document identification information data embedded in the storage medium and a password acquired from the outside match. can do.

  According to the storage medium, user authentication can be performed by acquiring document identification data and a password held by the user from the outside.

  In order to achieve the above object, the storage medium of the present invention further includes: the document concealment control program includes: document identification data embedded in the storage medium in the authentication program; document identification data acquired from the outside; A display switching procedure for displaying the document information when it is determined that the password corresponding to the document identification data embedded in the storage medium and the password acquired from the outside match. can do.

  Thereby, according to the said storage medium, it becomes possible to make the said document information browse only to a specific user.

  The storage medium of the present invention is a storage medium storing document information data consisting of text data and / or image data, a password generation program, an authentication program, and a document concealment control program. Based on the document identification data acquired from the outside, a password corresponding to the document identification information data is generated, and the authentication program authenticates the user based on the password generated by the password generation program and the password acquired from the outside. The document concealment control program may be configured to perform concealment control of the document information based on a result of executing the password generation program and the authentication program.

  According to the storage medium, user authentication can be performed without using an external device, and only a specific user can view and distribute.

  In the storage medium of the present invention, in order to achieve the above object, the authentication program further determines whether the password generated by the password generation program matches the password acquired from the outside. It can be configured to execute a password determination procedure.

  Thereby, it is possible to perform user authentication by acquiring a password held by the user.

  In order to achieve the above object, the storage medium of the present invention further includes: the document concealment control program includes a password generated by the password generation program in the authentication program and a password acquired from the outside. When it is determined that they match, a display switching procedure for displaying the document information can be executed.

  As a result, only the specific user can browse the document information.

  Further, in order to achieve the above object, the storage medium of the present invention further provides that the password generation program sets a password based on the document identification data when the document identification data acquired from the outside satisfies a predetermined condition. It can be set as the structure which performs the procedure to produce | generate.

  Thereby, only the user who has the document identification data satisfying the predetermined condition can browse the document information.

  In order to achieve the above object, the storage medium according to the present invention further includes: the password generation program includes the document identification data acquired from the outside in the password generation procedure, and time information when the document identification data is acquired. The password can be generated based on the above.

  Accordingly, it is possible to set an expiration date for the password based on the time information.

  The storage medium of the present invention is a storage medium in which document information data including text data and / or image data and a document concealment program are stored. The document concealment program releases the document concealment acquired from the outside. Based on the instruction, the document information can be concealed.

  According to the storage medium, document information can be browsed only by a user who gives an instruction to cancel document concealment.

  In order to achieve the above object, the storage medium of the present invention further includes: the document concealment control program includes authentication data for authenticating a user and text data and / or image data stored in the storage medium. When the document information data, the authentication program, and the document concealment control program are stored in an external device, the display switching procedure may be configured to execute a procedure for hiding the document information.

  In order to achieve the above object, the storage medium of the present invention further includes a document concealment control program for storing document information data consisting of text data and / or image data and a password stored in the storage medium. When the generation program, the authentication program, and the document concealment control program are stored in an external device, the display switching procedure may be configured to execute a procedure for hiding the document information.

  This prevents the electronic document from being stored in the external device while the document information is still viewable.

  In the storage medium of the present invention, in order to achieve the above object, the document concealment control program further includes authentication data for authenticating a user, text data and / or image data stored in the storage medium. When the document information data, the authentication program, and the document concealment control program are stored in the external device, the display switching procedure is configured to execute a procedure for hiding a part of the document information. Can do.

  In order to achieve the above object, the storage medium of the present invention further includes a document concealment control program for storing document information data consisting of text data and / or image data and a password stored in the storage medium. When the generation program, the authentication program, and the document concealment control program are stored in an external device, the display switching procedure may be configured to execute a procedure for hiding a part of the document information.

  As a result, only a specific user can browse a specific portion of the document information.

  In order to achieve the above object, the storage medium of the present invention further includes: the document concealment control program includes authentication data for authenticating a user and text data and / or image data stored in the storage medium. When the document information data, the pre-authentication program, and the document concealment control program are stored in an external device, the document identification data acquired from the outside can be deleted.

  In order to achieve the above object, the storage medium of the present invention further includes a document concealment control program for storing document information data consisting of text data and / or image data and a password stored in the storage medium. When the generation program, the authentication program, and the document concealment control program are stored in the external device, the document identification data acquired from the outside can be deleted.

  As a result, the document identification data can be prevented from being viewed by other users.

  In order to achieve the above object, the storage medium of the present invention can be configured such that the document concealment control program executes a procedure for displaying the document identification data acquired from the outside.

  Thereby, it becomes possible to specify the user who browsed or browsed the document information.

  Further, in order to achieve the above object, the storage medium of the present invention further includes a step of displaying the document identification data acquired from the outside, wherein the document identification data is displayed superimposed on the document information data. It can be set as the structure made to do.

  Thereby, it is possible to prevent leakage of document information to the outside.

  In addition, in order to achieve the above object, the storage medium of the present invention further stores time information indicating an expiration date during which the document information can be browsed, and the document concealment control program displays the expiration date. It can be set as the structure which performs the procedure to perform.

  This makes it possible for the user to grasp the expiration date during which the document information can be browsed.

  In order to achieve the above object, the storage medium of the present invention may be configured such that the document concealment program executes a procedure for displaying a password inquiry address corresponding to the document identification data. it can.

  Thereby, even if the user loses the password, it is possible to request reissue of the password.

  In order to achieve the above object, the storage medium of the present invention is further configured such that the document concealment program obtains time information indicating an expiration date during which the document information can be browsed and the document identification data from the outside. A procedure for comparing with time information is executed, and when the time when the document identification data is acquired from outside has passed the expiration date, an address of a new password inquiry corresponding to the document identification data is displayed. It can be set as the structure which performs a procedure.

  Thereby, even after the expiration date for browsing the document information has passed, the user can request issuance of a new password.

  In order to achieve the above object, the storage medium of the present invention can be configured such that the address of the inquiry destination is a URL and the URL is embedded.

  As a result, the user can easily request reissue of the password.

  In order to achieve the above object, the storage medium of the present invention further includes unique information unique to the document information, the authentication data, the unique information, and when the storage medium is read into an external device. A specific information generation program for generating specific information for specifying a viewer of the document information based on at least one of the time information may be stored.

  According to such a configuration, the viewer of the document information can be specified by the specific information.

  In order to achieve the above object, the storage medium of the present invention is further configured such that the authentication data, the document information data, and the document concealment data are each composed of a plurality of data groups, and the same The same identifier can be assigned to a plurality of data for realizing the function.

  Thereby, the plurality of data can be controlled for each identifier.

  Further, in order to achieve the above object, the storage medium of the present invention is configured to further display information indicating the acquisition status of the document identification data acquired from the outside or the password acquired from the outside. Can do.

  Thus, the user can grasp whether or not the document identification data and the password are correctly input.

  In order to achieve the above object, the storage medium of the present invention further stores predetermined time information in the storage medium, and the document concealment control program reads the storage medium into an external device. The document information can be displayed in the display switching procedure on the basis of the time information at the time and the predetermined time information stored in the storage medium.

  This makes it possible to limit the period during which the document information can be browsed.

  In order to achieve the above object, the storage medium of the present invention further includes the document information including a plurality of document information groups, and the document concealment control program includes a result of executing the authentication program and The document information can be concealed based on the authenticated user.

  This makes it possible to select document information to be displayed according to document identification data acquired from the outside.

  The document processing apparatus of the present invention is a document processing apparatus provided with a storage medium reading unit, an arithmetic processing unit, and an input unit, wherein the storage medium reading unit includes document identification data for identifying document information, and the document Reading a storage medium storing authentication data for authenticating a user consisting of a password corresponding to identification data, document information data consisting of text data or image data, an authentication program, and a document concealment control program, The arithmetic processing means executes the authentication program based on the authentication data input by the input means and the authentication data read by the storage medium reading means and stored in the storage medium. And executing the document concealment control program based on a result of executing the authentication program. That.

  Accordingly, user authentication can be performed without using an external device connected to the document processing apparatus, and browsing and distribution can be performed only to a specific user.

  The document processing apparatus of the present invention is a document processing apparatus provided with a storage medium reading means, an arithmetic processing means, and an input means, and the storage medium reading means includes document information data consisting of text data or image data, and a password. A storage medium storing a generation program, an authentication program, and a document concealment control program is read, and the input means corresponds to document identification data for identifying document information stored in the storage medium, and corresponds to the document identification data And the arithmetic processing means executes the password generation program for generating a password based on the input document identification data, the password generated by the password generation program, and the input document Based on the password corresponding to the identification data, execute the authentication program, Based on the results obtained by executing the serial authentication program may be configured to execute the document concealed control program.

  Accordingly, user authentication can be performed without using an external device connected to the document processing apparatus, and browsing and distribution can be performed only to a specific user.

  The document processing method of the present invention is a document processing method in a document processing apparatus, comprising a storage medium reading step, an arithmetic processing step, and an input step, wherein the storage medium reading step is for identifying document information. Authentication data for authenticating a user, data of document information consisting of text data or image data, an authentication program, and a document concealment control program Is stored, and the calculation processing step includes the authentication data input in the input step and the authentication data read in the storage medium reading step, wherein the authentication data is stored in the storage medium. And executing the authentication program based on the data and based on a result of executing the authentication program. It can be a method of performing concealment control of the document information by executing the document concealed control program.

  According to the document processing method, user authentication can be performed without using an external device, and browsing and distribution can be performed only to a specific user.

  The document processing method of the present invention is a document processing method in a document processing apparatus comprising a storage medium reading step, an arithmetic processing step, and an input step, wherein the storage medium reading step is based on text data or image data. Document identification data for reading the storage medium storing the document information data, the password generation program, the authentication program, and the document concealment control program, and identifying the document information stored in the storage medium by the input step And a password corresponding to the document identification data is input, and the calculation processing step executes the password generation program that generates a password based on the input document identification data, and is generated by the password generation program Corresponds to the password and the entered document identification data Based on the password, executes the authentication program, based on the result obtained by executing the authentication program, it is possible to execute the document concealed control program and method for performing a concealment control of the document information.

  According to the document processing method, user authentication can be performed without using an external device, and browsing and distribution can be performed only to a specific user.

  According to the present invention, it is possible to provide a storage medium and a document processing apparatus that can perform user authentication without using an external device and can be browsed and distributed only to a specific user.

  The storage medium of the present invention includes authentication data for authenticating a user, document information data including text data and / or image data, document concealment data for concealing the document information, an authentication program, and document concealment control. An electronic document having a program is stored.

  This electronic document is read into an external device having a display unit such as a computer, for example, and each program embedded in the electronic document according to the user's operation when the user tries to view the document information of the electronic document. Is executed on the external device. User authentication processing is performed by the processing of each program, and display or non-display control of document information included in the electronic document is performed based on the result.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an example of a hardware configuration diagram of a computer 10 that realizes a document processing apparatus capable of reading a storage medium 20 of the present invention. The computer 10 includes an arithmetic processing unit 11, a display unit 12, a storage medium reading unit 13, a memory 14, an input unit 15, a hard disk 16, and a network control unit (hereinafter, NCU) 17. The computer 10 reads the electronic document 30 stored in the storage medium 20 by the storage medium reading unit 13, and causes the calculation processing unit 11 to display the document information included in the electronic document 30 on the display unit 12.

  The arithmetic processing unit 11 is a CPU or the like, and performs arithmetic processing for realizing the functions of the computer 10 and control related to the arithmetic processing. The display unit 12 displays the result of the processing executed by the arithmetic processing unit 11. The storage medium reading unit 13 mediates between the arithmetic processing unit 11 and the storage medium 20 connected to the outside. The memory 14 stores a program for causing the computer 30 to function, various setting values, and the like.

  The input unit 15 is for a user to input various data. The hard disk 16 stores an application 18 for executing the electronic document 30, document information, processing result data in the arithmetic processing unit 11, and the like. The NCU 17 is used as a communication means, and may be connected to, for example, a general public line or a LAN line.

  FIG. 2 is an example of a diagram illustrating a data structure of the electronic document 30 stored in the storage medium 20 according to the first embodiment of the present invention. The electronic document 30 includes a data part 31 and a program part 32. The electronic document 30 is read into the computer 10 via the storage medium reading unit 13 and temporarily held in the memory 14. The held electronic document 30 is executed by the application 18. For example, the application 18 reads the data of the data unit 31 and displays the data on the display unit 12, reads the program of the program unit 32, causes the arithmetic processing unit 11 to execute the result, and displays the result on the display unit 12.

  The data unit 31 includes document information 33, authentication data 34, and document concealment data 35. The document information 33 is composed of text data and image data, and is displayed on the display unit 12 of the computer 10. The authentication data 34 is data for authenticating a user who wants to view the electronic document 30. The authentication data in this embodiment is a user ID and a password corresponding to the user ID. Further, the authentication data 34 may be a plurality of user IDs and a plurality of passwords corresponding thereto, and the user ID and password identical to these user IDs and passwords are given to the user in advance. The document concealment data 35 is data for concealing the document information 33, and is non-transparent text data that cannot be edited.

  The program unit 32 includes an authentication program 36, a document concealment control program 37, and a specific information generation program 39. The authentication program 36 is a program for executing processing for authenticating the user, and the document concealment program 37 executes concealment control of the document information 33 using the document concealment data 35 based on the result of executing the authentication program 36. It is a program to let you. The specific information generation program 39 is a program that generates information for specifying a viewer who browses the document information 33. Details of processing executed in these programs will be described later.

  The electronic document 30 in the present embodiment is, for example, a PDF document, and the data constituting the data unit 31 is, for example, HTML format data. The program included in the program unit 32 is, for example, JavaScript, and the JavaScript may be embedded in HTML format data constituting the data unit 31. Furthermore, the application 18 that executes the electronic document 30 is an application that can handle a PDF document, and is, for example, Adobe Reader (registered trademark).

  Hereinafter, a user authentication process until the document information 33 of the electronic document 30 is displayed on the display unit 12 so as to be viewable by the user will be described with reference to FIGS. FIG. 3 shows a state where the electronic document 30 of the first embodiment is displayed on the display unit 12, and is an example of a screen transition diagram of the electronic document 30. FIG. 4 is a flowchart for explaining user authentication processing and document concealment control processing in the electronic document 30.

  FIG. 3A is a diagram illustrating an example displayed on the display unit 12 in a state before user authentication is performed in the electronic document 30. The electronic document 30 has an editable text form (hereinafter referred to as ID form) 37a for inputting a user ID and an editable text form (hereinafter referred to as password form) 37b for inputting a password. Further, the electronic document 30 has document ID data that hides the document information 33 and the non-editable text form (hereinafter referred to as a watermark form) 37w that is displayed after the user ID input to the ID form 37a is substituted. It has a shadow form 38s to be displayed.

  Each of these forms has a display attribute that controls whether the user can view the data displayed on each form. This switching of display attributes is controlled by a document concealment control program.

  Here, the shadow form 38s and the document information 33 form a layer structure, and the document information 33 is concealed by displaying the shadow form 38s on which the document concealment data 35 is displayed on the document information 33. ing.

  Further, when the electronic document 30 covers a plurality of pages, the ID form 37a and the password form 37b are arranged on the first page, and the document information 33 and the shadow form 38s for concealing the document information 33 are arranged in a layer structure on the second and subsequent pages. However, it is not limited to this configuration. For example, the ID form 37a and the password form 37b may be arranged on the second and subsequent pages of the plurality of pages of the electronic document 30. In this case, the document information 33 included in the page before the page on which the ID form 37a and the password form 37b are arranged may not be concealed, and may be document information that can be opened to the public.

  In FIG. 3A, since the user authentication process is not executed, the display attribute of the shadow form 38s is displayed, the document concealment data is displayed, and the document information 33 is concealed. Therefore, the user cannot browse the document information 33. At this time, the display attribute of the watermark form 37w is not displayed.

  The user authentication process will be described below. The user inputs a user ID and a password given in advance from the input unit 15 to the ID form 37a and the password form 37b. Then, the application 18 causes the arithmetic processing unit 11 to execute the authentication program 36 embedded in the electronic document 30. At this time, the user ID given in advance to the user is aaa@aaa.com, and the password is aaa.

  In S41 of FIG. 4, the arithmetic processing unit 11 determines whether or not the same user ID as the user ID input in the ID form 37a exists in the authentication data 34. When the same user ID does not exist here, the arithmetic processing unit 11 ends the user authentication process.

  When the same user ID as the input user ID exists in the authentication data 34, in S42, the arithmetic processing unit 11 receives the password corresponding to the user ID in the authentication data 34 and the password input in the password form 37b. Determine if they match. If these passwords do not match, the arithmetic processing unit 11 ends the user authentication process.

  The arithmetic processing unit 11 authenticates the user when the password corresponding to the user ID in the authentication data 34 matches the password entered in the password form 37b. In response to this result, the application 18 causes the arithmetic processing unit 11 to execute the document concealment control program 37 embedded in the electronic document 30.

  When the user is authenticated, the arithmetic processing unit 11 switches the display attribute of the shadow form 38s from display to non-display in S43. Then, since the document concealment data 35 displayed on the shadow form 38s is not displayed, the document information 33 displayed below the shadow form 38s becomes visible and can be viewed by the user. In S43, the arithmetic processing unit 11 switches the display attribute of the watermark form 37w from non-display to display, and displays the user ID input to the watermark form 37w. Then, the arithmetic processing unit 11 ends the processing of the document concealment control program.

  FIG. 3B is an example of a diagram illustrating a state in which the document information 33 can be browsed after user authentication in the electronic document 30. A user ID input by the user is displayed on the watermark form 37w, and the document information 33 concealed by the shadow form 38s is visible.

  Thus, in the electronic document 30, user authentication can be performed by the authentication data and the authentication program that the electronic document 30 has. Further, the document information concealment control can be performed by the document concealment data and the document concealment control program which the electronic document 30 has. Therefore, user authentication can be performed without depending on the functions of an external device or other applications, and only a specific user can view or distribute the user. As a result, even if the document information is highly confidential, it is possible to prevent leakage to a third party.

  Further, by displaying the user ID, it is possible to specify the user who has browsed the electronic document 30, and even if the electronic document 30 is leaked to a third party, the source of the leak can be traced.

  Further, for example, when the electronic document 30 is composed of a plurality of pages, the watermark form 37w is preferably arranged on all pages, and the user ID is preferably displayed on the watermark form 37w on all pages after user authentication. According to this, even if only a part of the electronic document is leaked to a third party, the leak source can be specified.

  FIG. 5 is an example of a diagram illustrating a data structure of an electronic document 30A that does not have document concealment data. The data structure of the electronic document 30A is the same as that of the electronic document 30 except that it does not have the document concealment data 35 shown in FIG. In the electronic document 30A, the document information 33 is displayed on a content form having a display attribute, and the display attribute of the content form 37c is controlled by the document concealment control program, thereby hiding the document information 33 without using the document concealment data. Take control.

  FIG. 6 shows an example of a screen transition diagram of the electronic document 30A. FIG. 6A shows a display state before user authentication is performed in the electronic document 30A, and the display attributes of the watermark form 37w and the content form 37c are not displayed. Therefore, the user cannot browse the document information 33 displayed on the content form 37c.

  Here, when a user ID and password are input by the user and user authentication is performed by the authentication program 36, the display attributes of the watermark form 37w and the content form 37c are switched from non-display to display by the document hiding control program 37. . FIG. 6B shows a display state after user authentication of the electronic document 30A. Here, since the display attributes of the watermark form 37w and the content form 37c are displayed, the user ID and the document information 33 are visible and can be viewed by the user.

  The content form 37c and the shadow form 38s may coexist in the same electronic document. In this case, in the document information concealment control by the document concealment control program 37, the display attributes of the shadow form 38s and the content form 37c are set respectively. This can be realized by independent control. The document information concealment control in the electronic document in which the content form 37c and the shadow form 38s are mixed will be described below.

  FIG. 7 is an example of a diagram illustrating a state in which a plurality of types of forms are mixed on the same page of the electronic document 30B including a plurality of pages. FIG. 7A is an example of a diagram showing a display state before user authentication in the electronic document 30B, and FIG. 7B is an example of a diagram showing a display state after user authentication in the electronic document 30B.

  The electronic document 30B shown in FIG. 7 conceals the authentication data, the document information 33a, the document information 33b, the ID form 37a, the password form 37b, the watermark form 37w, the content form 37c on which the document information 33a is displayed, and the document information 33b. It has a shadow form 38s.

  In FIG. 7A, since the user is not authenticated, the display attributes of the watermark form 37w and the content form 37c are not displayed. Therefore, the document information 33a displayed on the content form 37c is invisible. The display attribute of the shadow form 38s is display, and the document concealment data is displayed on the shadow form 38s. Therefore, the document information 33b covered with the document concealment data is invisible. For this reason, the user cannot browse the document information 33a and the document information 33b.

  Here, when the user inputs a user ID and password from the input unit 15 and the user is authenticated by the authentication program 36, the application 18 causes the arithmetic processing unit 11 to execute the document concealment control program 37. In the document hiding control program 37, the arithmetic processing unit 11 switches the display attributes of the watermark form 37w and the content form 37c from non-display to display. Thereby, the user ID displayed on the watermark form 37w and the document information 33a displayed on the content form 37c become visible.

  Then, the arithmetic processing unit 11 switches the display attribute of the shadow form 38s from display to non-display. Thereby, the document information 33b concealed by the shadow form 38s becomes visible, so that the user can browse the document information 33a and the document information 33b.

  As shown in FIG. 7, when concealing control of document information over a plurality of pages is performed, a plurality of content forms 37c or shadow forms 38s and the same number of watermark forms 37w as the number of pages are required. Therefore, in the present embodiment, the same form name is used as an identifier for the form realizing the same function.

  For example, in FIG. 7A, the shadow forms 38 s from page 2 to page n all have the same form name as Shdw. Similarly, the form name of the content form 37c is Cont, and the form name of the watermark form 37w is Wm.

  By doing this, it is possible to perform display attribute switching control collectively using the form name as an identifier. Therefore, even if the number of forms requiring display attribute switching control increases in the document hiding control program, the number of control commands does not increase without complicating the control commands. For this reason, the size of the document concealment control program does not increase, and further, the document size of the electronic document 30B does not increase.

  Next, the document information concealment control corresponding to the user when a plurality of authentication data is embedded in the electronic document will be described with reference to FIGS. FIG. 8 is an example of a screen transition diagram when performing document concealment control corresponding to a user using a shadow form, and FIG. 9 is a flowchart for explaining document concealment control corresponding to a user using a shadow form.

  The electronic document 30C shown in FIG. 8 includes a plurality of authentication data and different document information 33c, document information 33d, ID form 37a, password form 37b, watermark form 37w, and shadow form 38s1 that hide the document information 33c corresponding to the user. , A shadow form 38s2 for hiding the document information 33d.

  In the electronic document 30C, a user having authentication data with a user ID of aaa@aaa.com and a password of aaa can view only the document information 33c, and a user having other authentication data can view only the document information 33d. It was possible.

  FIG. 8A is an example of a diagram illustrating a state in which user authentication is not performed in the electronic document 30C. Since the user authentication is not performed in the state of FIG. 8A, the display attribute of the watermark form 37w is not displayed, the display attributes of the shadow form 38s1 and the shadow form 38s2 are displayed, and the document information 33c and the document information 33d are displayed. Are both invisible.

  Here, when a user ID and a password are respectively input to the ID form 37a and the password form 37b by the user, the arithmetic processing unit 11 executes a user authentication process in S91 of FIG. The user authentication process executed here is the same as the process in S41 and S42 of FIG.

  When the user is authenticated in S92, the arithmetic processing unit 11 ends the user authentication process. Upon receiving the end of the user authentication process, the application 18 causes the arithmetic processing unit 11 to execute the document concealment control program 37 next. In S93, the arithmetic processing unit 11 determines whether or not the authenticated user ID is aaa@aaa.com.

  If the authenticated user ID is aaa@aaa.com, the arithmetic processing unit 11 displays the display attribute of the watermark form 37w from non-display as shown in FIG. 8B in S94. To make the user ID visible. Further, the arithmetic processing unit 11 switches the display attribute of the shadow form 38s1 from display to non-display to make the document information 33c visible. At this time, since the display attribute of the shadow form 38s2 remains displayed, the document information 33d remains invisible.

  In S93, when the authenticated user ID is other than aaa@aaa.com, the arithmetic processing unit 11 changes the display attribute of the watermark form 37w from non-display in S95 as shown in FIG. 8C. The display is switched to make the user ID visible. Then, the display attribute of the shadow form 38s2 is switched from display to non-display to make the document information 33d visible. At this time, since the display attribute of the shadow form 38s2 remains displayed, the document information 33c remains invisible.

  In this way, it is possible to change document information that can be browsed by the user in the electronic document 30C.

  FIG. 10 is a screen transition diagram when document concealment control corresponding to the user using the content form is performed, and FIG. 11 is a flowchart for explaining document concealment control corresponding to the user using the content form.

  The electronic document 30D shown in FIG. 10 implements the functions described in FIGS. 8 and 9 using a content form. The electronic document 30D includes an ID form 37a, a password form 37b, a watermark form 37w, a content form 37c1 that displays document information 33e, and a content form 37c2 that displays document information 33f.

  FIG. 10A is an example of a diagram illustrating a state in which user authentication is not performed in the electronic document 30D. Since the user authentication is not performed in the state of FIG. 10A, the display attributes of the watermark form 37w, the content form 37c1, and the content form 37c2 are not displayed, and both the document information 33e and the document information 33f are invisible. State.

  When the user inputs a user ID and a password to the ID form 37a and the password form 37b, the arithmetic processing unit 11 executes a user authentication process in S111 of FIG. The user authentication process executed here is the same as the process in S41 and S42 of FIG.

  When the user is authenticated in S112, the arithmetic processing unit 11 ends the user authentication process. Upon receiving the end of the user authentication process, the application 18 causes the arithmetic processing unit 11 to execute the document concealment control program 37 next. In the document concealment control program 37, the arithmetic processing unit 11 determines whether or not the authenticated user ID is aaa@aaa.com in S113.

  When the authenticated user ID is aaa@aaa.com, the arithmetic processing unit 11 hides the display attributes of the watermark form 37w and the content form 37c1 in S11 as shown in FIG. 10B. Is switched to display, and the user ID and the document information 33e are made visible. At this time, since the display attribute of the content form 37c2 remains hidden, the document information 33f displayed on the content form 37c2 remains invisible.

  When the user ID authenticated in S113 is other than aaa@aaa.com, the arithmetic processing unit 11 sets the display attributes of the watermark form 37w and the content form 37c2 in S115 as shown in FIG. Switching from non-display to display, the user ID and the document information 33f are made visible. At this time, the display attribute of the content form 37c1 remains hidden, and thus the document information 33e displayed on the content form 37c1 remains invisible.

  In this way, in the electronic document 30D, it is possible to change the document information that can be browsed by the user using the content form.

  In addition, by embedding a plurality of authentication data in an electronic document, even when the same electronic document is distributed to a plurality of users, user authentication processing can be performed corresponding to the authentication data for each user. For this reason, even if the same electronic document is distributed to a plurality of users, the risk of document information leaking can be reduced. Also, the electronic document issuer need not create a different electronic document for each user.

  Next, with reference to FIGS. 12 and 13, processing related to acquisition of authentication data input from the user will be described. The electronic document 30E (not shown) is provided with a status form that displays information indicating the input state of the user ID and password to the ID form 37a and the password form 37b. The information indicating the input state here is, for example, an error content when a user ID or password is input. The status form is preferably arranged in a portion that is not concealed in the concealment control, for example, in the vicinity of the ID form and the password form.

  FIG. 12 is a flowchart for explaining processing executed in the authentication program 36 when a user ID is input to the ID form 37a. In this embodiment, the input user ID is regarded as an error when, for example, an input prohibited character such as a space (space) is input to the user ID, or when the user ID is less than a predetermined number of characters. This is when the ID is not entered in a prescribed format such as an email address. In FIG. 12, the user ID input in the case of these three cases is determined as an error.

  When the user ID is input to the ID form 37a, the application 18 causes the authentication program 36 to be executed. The authentication program 36 causes the arithmetic processing unit 11 to execute a process of determining whether the input user ID is correctly input.

  When the user ID is input to the ID form 37a, the arithmetic processing unit 11 determines whether or not a blank is included in the input user ID in S121. Here, when the user ID includes a blank, the arithmetic processing unit 11 displays the error content 1 on the status form in S122. Here, the error content 1 is “ID contains a blank”.

  If no blank is included in the user ID in S121, the calculation processing unit 11 determines in S123 whether the number of characters of the user ID is eight or more. When the user ID is less than 8 characters, the arithmetic processing unit 11 displays the error content 2 on the status form in S124. Here, the error content 2 is “ID needs 8 characters or more”.

  When the user ID is 8 characters or more in S123, the arithmetic processing unit 11 determines whether or not the user ID is in a mail address format in S125. If the user ID is not in the mail address format, the arithmetic processing unit 11 displays the error content 3 on the status form in S126. Here, the error content 3 is “ID requires a mail address format”.

  In S125, when the user ID is input in the mail address format, the arithmetic processing unit 11 determines that the user ID is correctly input in S127, and displays the content of the input 1 on the status form. At this time, the content of the input 1 is “Please enter your password”. By this display, the user can confirm that the user ID has been correctly input, and can input the password to the password form 37b.

  FIG. 13 is a flowchart for explaining processing executed by the authentication program after a password is entered in the password form 37b. When the user inputs a user ID and a password to the ID form 37a and the password form 37b, the arithmetic processing unit 11 executes a user authentication process in S131 of FIG. The user authentication process executed here is the same as the process in S41 and S42 of FIG.

  When the user authentication is performed in S132, the arithmetic processing unit 11 displays that the document information can be browsed on the status form in S133. In S132, when user authentication is not performed due to an incorrect password input or the like, the arithmetic processing unit 11 displays in the status form that the user ID or password is not correctly input in S134.

  Thereby, the user can correctly input the authentication data with reference to the display contents of the status form.

  Next, control related to input of authentication data by the user will be described with reference to FIGS. FIG. 14 is an example of a first screen transition diagram illustrating the input restriction of authentication data. In FIG. 14A, when the correct user ID and password are not entered in both the ID form 37a and the password form 37b, the user is not authenticated, so the display attribute of the shadow form 38s remains unchanged. Therefore, the document information 33 remains invisible.

  Here, in the electronic document 30, if an incorrect user ID or password is input a predetermined number of times, data cannot be input to the ID form 37a and the password form 37b. That is, the authentication program 36 continuously inputs an unauthorized user ID and password more than a predetermined number of times in the user ID authentication process of S41 of FIG. 4 and the password authentication process of S42 of FIG. If it is determined that the data is hidden, the document concealment control program 37 causes the arithmetic processing unit 11 to execute a write prohibition process that prevents data from being written to the ID form 37a and the password form 37b.

  The write prohibition process is a process for switching the ID form 37a and the password form 37b to a read-only form, for example. According to this process, the user cannot input data into the ID form 37a and the password form 37b.

  In addition to the process for prohibiting writing, the process here may be a process for always switching display attributes of the ID form 37a and the password form 37b to non-display attributes. According to this process, the data input to the ID form 37a and the password form 37b becomes invisible, so that it is not possible to input data to the ID form 37a and the password form 37b. In this case, it is preferable that the ID form 37a and the password form 37b have a display attribute for controlling whether or not the data input to each is displayed.

  The electronic document 30 in a state where the above-described processing has been executed is shown in FIG. Here, the fact that data writing to the ID form 37a and the password form 37b is prohibited may be displayed in the vicinity of the ID form 37a and the password form 37b.

  Further, the predetermined number of times here may indicate, for example, the number of times an unauthorized user ID is input in S41, or may indicate the number of times an unauthorized password is input in S42. . Further, it may indicate the total number of times that an unauthorized user ID and an unauthorized password are input in each of S41 and S42.

  In this way, by restricting the number of authentication data inputs and prohibiting the writing of authentication data more than a predetermined number of times, various user IDs and passwords generated by combining letters and numbers are guessed sequentially. It is possible to prevent the authentication data from being illegally determined by the technique.

  Next, the authentication data input restriction after the user authentication is once performed will be described. FIG. 15 is an example of a second screen transition diagram illustrating the input restriction of authentication data.

  In FIG. 15A, when the correct user ID and password are input to the ID form 37a and the password form 37b, the display attribute of the shadow form 38s is switched from display to non-display, as shown in FIG. 15B. The document information 33 becomes visible.

  Here, once the user authentication is performed, the document concealment control program 37 may cause the arithmetic processing unit 11 to execute a process of switching the display attributes of the ID form 37a and the password form 37b from display to non-display. As a result, the ID form 37a and the password form 37b become invisible, and data cannot be input to the ID form 37a and the password form 37b.

  Further, the document concealment control program 37 causes the arithmetic processing unit 11 to execute a write prohibition process for making data unwritable once the user authentication is performed, so that the ID form 37a and the password form 37b are converted into a read-only form. It may be switched.

  In this way, by prohibiting the writing of data to the ID form 37a and the password form 37b once the user authentication is performed, the user is erroneously caused by an unintended mistake while browsing the document information 33. Input of authentication data can be prevented. Therefore, the authentication program 36 does not function due to unauthorized authentication data input by mistake, and the document information 33 is not hidden again.

  Next, display of the user ID on the ID form 37a will be described with reference to FIG. FIG. 16 is an example of a screen transition diagram for explaining the display of the user ID.

  In the electronic document 30 of the present embodiment, when a user ID exceeding the number of characters that can be displayed on the ID form 37a is input, the size of the character of the user ID automatically input by the authentication program 36 is changed, All characters of the user ID input to the ID form 37a can be browsed. At this time, the number of characters that can be displayed on the ID form 37a is preferably set in advance.

  For example, the user ID input in FIG. 16 is ricoh @ ricoh. co. jp. Assume that the number of characters that can be displayed on the ID form 37a is set to 15 characters. In this case, when this user ID is input to the ID form 37a, jp which is the last two characters of the user ID is not displayed as shown in FIG.

  Therefore, the authentication program 36 causes the arithmetic processing unit 11 to execute a process of reducing the size of all the characters of the user ID, and as shown in FIG. 16B, all the characters of the input user ID. Is displayed for browsing. By executing such processing, when the user inputs data, it can be confirmed at a glance whether or not there is an error in the input user ID.

  Although only the ID form 37a has been described with reference to FIG. 16, the same process may be executed for the password form 37b. That is, also in the password form 37b, when a password having a number of characters larger than the number of characters that can be displayed on the password form 37b is input, the characters of the input password are automatically reduced, and all the characters of the input password are reduced. Is displayed.

  Thus, if it displays so that the input user ID and password can be confirmed at a glance, it can prevent that a user inputs a wrong user ID and password continuously.

  Further, in the electronic document 30, the address and contact address of the user ID and password may be displayed in the vicinity of the ID form 37a and the password form 37b. FIG. 17 is an example of a diagram showing a state in which the address and contact address of the inquiry destination of the user ID and password are displayed. This inquiry destination may be, for example, a contact telephone number, or if an online password request is possible on the Internet, a URL link specifying an Internet address may be embedded.

  According to this, even when the user loses the authentication data, it is possible to promptly request reissuance of the authentication data.

  Further, in the electronic document 30, information that is a key for accessing the inquiry destination may be generated and displayed. FIG. 18 is an example of a diagram for explaining a key for accessing an inquiry destination.

  This key information is generated by the specific information generation program 39. For example, in the electronic document 30, when authentication data is input to the ID form 37 a and the password form 37 b, the specific information generation program 39 sends a user-specific key that can specify a user based on the authentication data to the arithmetic processing unit 11. The process which produces | generates this information is performed. The electronic document 30 has an access form 38a on which key information generated by this processing is displayed. This access form 38a may display the address and contact address of the inquiry described with reference to FIG. 17 together with the key information.

  The access form 38a has a display attribute for controlling the display and non-display of data in the access form 38a, as with other various forms of the electronic document 30, and this display attribute is switched by the document concealment control program 37. Being controlled.

  For example, in FIG. 18A, no data is input to the ID form 37a and the password form 37b, and user authentication is not performed, so key information is not generated. Therefore, only the inquiry address and contact telephone number are displayed on the access form 38a.

  Here, when the correct user ID and password are input to the ID form 37a and the password form 37b and the user is authenticated, the specific information generating program 39 causes the arithmetic processing unit 11 to based on the input user ID and password. A process for generating key information that can identify a user is executed. Then, as shown in FIG. 18B, the document concealment control program 37 causes the arithmetic processing unit 11 to display the generated key information on the access form 38a together with the inquiry address and the contact telephone number.

  For example, after accessing the inquiry address, the user provides the key information to the distribution source of the electronic document 30 by inputting the key information, thereby allowing the distribution source of the electronic document 30 to identify the user. it can. Therefore, the distribution source of the electronic document 30 does not need to make a user identity inquiry. Further, when the user calls the contact telephone number, this key information may be transmitted verbally. Furthermore, if all of the key information is a number, even if a telephone is used, the key information can be transmitted to the distribution source using the telephone numeric keypad, not verbally.

  Here, the key information may be generated based on, for example, the unique identification number of the electronic document 30 or the time information of the time when the authentication data is input, in addition to the authentication data including the user ID and the password. good.

  For example, when the key information is generated based on the authentication data and the time information, the key information includes time information. Therefore, if this time information is used, an expiration date can be set for the key information. For example, after a predetermined time elapses after the key information is generated, the key information may be invalidated, and only the key information generated by inputting the authentication data again may be validated. In addition, after a predetermined time has elapsed since the key information is generated and displayed on the access form 38a, the display attribute of the access form 38a is switched from display to non-display, and the key information is invisible. It is also good.

  In this way, even if the electronic document 30 may be left with the key information displayed, the key information can be prevented from leaking to a third party.

  Further, in the electronic document 30, the information generated by the specific information generation program 39 may be a URL of an inquiry destination address including user-specific information that can specify a user. FIG. 19 is an example of a diagram illustrating a state in which an inquiry destination including user-specific information is displayed.

  For example, in the electronic document 30, when authentication data is input to the ID form 37 a and the password form 37 b, the specific information generation program 39 stores the inquiry processing address set in advance in the arithmetic processing unit 11 and the input authentication data. Based on this, a process for generating an inquiry destination address including information for identifying the user is executed. Further, in the electronic document 30, the inquiry address generated by this processing is displayed on the access form 38a.

  For example, in FIG. 19A, no data is input to the ID form 37a and the password form 37b, and the user is not authenticated, so no inquiry destination is generated. Therefore, nothing is displayed on the access form 38a. Here, when the correct user ID and password are input to the ID form 37a and the password form 37b and the user is authenticated, the specific information generation program 39 inputs the inquiry destination set in advance to the arithmetic processing unit 11 and this input. On the basis of the user ID and password, a process of generating an inquiry destination address including information that can identify the user is executed. Then, as shown in FIG. 19B, the document concealment control program 37 causes the arithmetic processing unit 11 to display the generated inquiry destination on the access form 38a.

  At this time, the specific information generation program 39 determines the inquiry destination based on, for example, the unique identification number of the electronic document 30 or the time information of the time when the authentication data is input, in addition to the authentication data including the user ID and the password. May be generated. The inquiry destination generated here may be, for example, a URL including the above-described authentication data, identification information of the electronic document 30, time information when the authentication data is input, and the like.

  In this way, by generating an inquiry address including information such as authentication data for specifying the user, the distribution source of the electronic document 30 can specify the user when the user accesses the inquiry address. Therefore, it is not necessary for the distribution source of the electronic document 30 to confirm the identity of the user when making an inquiry. In addition, the inquiry destination displayed on the access form 38a in FIG. 19B may be displayed in an encrypted state by appropriate processing.

  Further, as in the case of the key information described with reference to FIG. 18, when the inquiry destination address is generated using the time information at the time when the authentication data is input, the inquiry destination address also includes the key information and A similar expiration date may be provided.

  Next, processing for storing the electronic document 30 will be described with reference to FIG. FIG. 20 is an example of a screen transition diagram when the electronic document 30 is stored. The electronic document 30 executed on the computer 10 is saved by the user who has finished browsing. When the user instructs to save the electronic document 30, the arithmetic processing unit 11 overwrites and saves the electronic document 30 on the storage medium 20 again. At this time, the electronic document 30 may be stored in the hard disk 16.

  FIG. 20A shows a state before user authentication is performed in the electronic document 30. When the user ID and password are entered in the ID form 37a and password form 37b and the user is authenticated, the display attributes of the watermark form 37w and content form 37c are switched from non-display to display, and the shadow form 38s is displayed. The attribute is switched from display to non-display. Then, the document information and the user ID are visible (see FIG. 20B).

  Here, if the electronic document 30 is stored as it is after the user browses the document information, the electronic document 30 is stored in a state where user authentication has been performed. For this reason, when the electronic document 30 is opened next time, the user ID and the document information are in a visible state, and a third party can view the document information without performing user authentication.

  Therefore, in this embodiment, when the electronic document 30 is stored, the electronic document 30 is returned to the initial state before opening. That is, when an instruction to save the electronic document 30 is issued by the user, the application 18 causes the document concealment control program 37 to execute the electronic document 30 saving process. In the document hiding control program, the arithmetic processing unit 11 deletes the input user ID and password from the ID form 37a and the password form 37b. Then, the display attributes of the watermark form 37w and the content form 37c are switched from display to non-display, and the display attributes of the shadow form 38s are switched from non-display to display.

  Then, the electronic document 30 returns to the initial state shown in FIG. 20A, and the user ID and the document information become invisible (see FIG. 20C). The arithmetic processing unit 11 stores the electronic document 30 after returning the electronic document 30 to the initial state as described above.

  As described above, when the electronic document is stored, if the electronic document is returned to the initial state before opening, the document information is hidden even if the electronic document is opened by a third party. Leakage can be prevented.

  Next, document information concealment control based on time information in the electronic document 30 will be described. For example, in the electronic document 30, a viewable period during which the document information 33 can be browsed is determined in advance. In this case, information indicating the period during which the document information 33 in the electronic document 30 can be browsed is embedded in the electronic document 30 in advance. In the electronic document 30, even when the user is authenticated, the document information 33 remains hidden if the user authentication time is not within the browsing period, and the user browses the document information 33. Can not do it.

  FIG. 21 is a flowchart illustrating document information concealment control based on time information in the electronic document 30 described above. The user authentication process executed by the authentication program 36 in S161 is the same as the process in S41 and S42 of FIG. When the user authentication is performed in S162, the arithmetic processing unit 11 that executes the authentication program detects the date and time when the user authentication is performed in S163, and whether or not the detected date and time corresponds to the viewable period embedded in the electronic document 30. Judging. Here, when the date and time when the user is authenticated is not within the viewable time limit, the arithmetic processing unit 11 ends the user authentication process.

  At this time, the date and time when the user is authenticated is detected by the arithmetic processing unit 11 based on a clock function built in the computer 10. Further, here, after the user authentication process is completed, the arithmetic processing unit 11 may display that the electronic document 30 has been browsed and the browsing is impossible.

  If the date and time when the user is authenticated is within the browsing enabled period, the arithmetic processing unit 11 executes processing in the document concealment control program 37 so that the user can browse the document information 33 in S164. That is, the display attribute of the watermark form 37w is switched from non-display to display to display the user ID, and the display attribute of the shadow form 38s is switched from display to non-display to make the document information 33 visible.

  As a result, it is impossible to browse an electronic document whose browsing period has passed. Therefore, the user can be requested to issue a new electronic document.

  Next, display of the watermark form 37w will be described.

  FIG. 22 is an example of a diagram illustrating a state in which the watermark form 37w is arranged at a position that can be concealed by the shadow form 38s. FIG. 22A shows the electronic document 30 before user authentication. At this time, the watermark form 37w is concealed by the shadow form 38s.

  Here, when authentication data is input and user authentication is performed, the electronic document 30 is in a state shown in FIG. That is, the display attribute of the shadow form 38s is switched from display to non-display, and the user ID displayed on the document information 33 and the watermark form 37w becomes visible.

  As described above, if the watermark form 37w is arranged at a position that can be concealed by the shadow form 38s, the user ID displayed on the watermark form 37w is displayed and non-displayed similarly to the concealment control of the document information 33 by the shadow form 38s. The display is controlled. Therefore, even if the watermark form 37w itself does not have a display attribute and only has a function of displaying the user ID input to the ID form 37a, the shadow form 38s can display and hide the user ID. Switching control can be performed.

  Therefore, by arranging the watermark form 37w and the shadow form 38s in this way, the number of forms that require display attribute control can be reduced, and the file size of the electronic document 30 can be reduced.

  FIG. 23 is an example of a diagram showing a state in which the watermark form 37w is arranged so as to overlap the document information 33. FIG. 23A shows the state of the electronic document 30 before user authentication. Here, when correct authentication data is input to the ID form 37a and the password form 37b, the display attribute of the shadow form 38s is switched from display to non-display, and the state transitions to the state shown in FIG. Here, since the watermark form 37w is arranged so as to overlap the document information 33, the user ID is displayed so as to overlap the document information 33.

  Thus, by displaying the document information 33 and the user ID in an overlapping manner, especially when the electronic document 30 is printed, only the user ID is illegally deleted and only the document information 33 is leaked to the outside. Can be prevented.

  Hereinafter, an example in which the watermark form 37w and the document information 33 are displayed in a superimposed manner will be described with reference to FIGS.

  FIG. 24 is a first diagram for explaining the font of characters in the watermark form 37w and the document information 33. In the electronic document 30, the user ID displayed on the watermark form 37 w is displayed superimposed on the document information 33. Therefore, as shown in FIG. 24A, when the font used for the characters displayed in the watermark form 37w is a font that is thicker than the characters of the document information 33, the document information 33 When browsing, it becomes difficult to recognize the characters of the document information 33.

  Therefore, as shown in FIG. 24B, the font used for the characters displayed in the watermark form 37w is preferably a font that is thinner than the characters of the document information 33. According to this, even if the user ID and the document information 33 are superimposed and displayed, the characters of the document information 33 can be easily recognized.

  More specifically, in FIG. 24, the character strings arranged in the vertical direction on the paper surface are user IDs displayed in the watermark form 37w, and the character strings arranged in the horizontal direction on the paper surface are the document information 33. Is the character. In FIG. 24A, the font “Lucida Sans Unicode” is used for the characters “RICOH” as the user ID. In FIG. 24B, a font “Courier New” is used. The fonts of the characters shown in FIGS. 24A and 24B are 48-point monospaced fonts, and the character arrangement is the same.

  Here, in FIG. 24A, the area where the character indicating the user ID and the character indicating the document content overlap is large. In particular, in the character string of the document information 33, it is very difficult to recognize characters in “C” at the top and “C” at the bottom. On the other hand, in FIG. 24B, the area where the character indicating the user ID and the character indicating the document content are overlapped is small, and the character string of the document information 33 can be sufficiently recognized.

  Thus, by using a narrower font for the character indicating the user ID, the area overlapping with the character of the document information 33 can be reduced, and when the document information 33 is browsed, the character of the document information 33 is displayed. Can be prevented from becoming difficult to recognize.

  FIG. 25 is a second diagram for explaining the font of characters in the watermark form 37w and the document information 33. In FIG. In FIG. 25, the character string shown in the horizontal direction on the paper is the document information 33, and the character example shown in the vertical direction on the paper is the user ID displayed in the watermark form 37w.

  In FIG. 25A, a proportional font which is a font in which an optimum width is set for each character is used for the character indicating the user ID. In such a proportional font, especially when the characters “i” and “j” are used for the user ID, the area superimposed on the characters of the document information 33 becomes large. Therefore, when browsing the document information 33, it is difficult to recognize the characters of the document information 33.

  More specifically, in FIG. 25A, a font called “Centur Gothic”, which is a proportional font, is used as the character indicating the user ID. In FIG. 25B, a font called Courier New, which is a monospaced font, is used. Each of the character fonts shown in FIGS. 25A and 25B has 48 points, and the character arrangement is the same.

  Here, in FIG. 25A, it is very difficult to recognize characters especially in the uppermost “C” and the middle “I” of the character string of the document information 33. On the other hand, in FIG. 25B, since a monospaced font is used for the character indicating the user ID, the number of characters indicating the user ID displayed in the same area is smaller than that in FIG. . Therefore, since the area where the character indicating the user ID and the character indicating the document content are overlapped is small, the character string of the document information 33 can be sufficiently recognized.

  As described above, by using the monospaced font for the character indicating the user ID, the area overlapping with the character of the document information 33 can be reduced, and the character of the document information 33 is recognized when the document information 33 is browsed. It can be prevented from becoming difficult.

  FIG. 26 is a third diagram for explaining the font of characters in the watermark form 37w and the document information 33. In FIG. In FIG. 26, the character string shown in the horizontal direction on the paper is the document information 33, and the character example shown in the vertical direction on the paper is the user ID displayed in the watermark form 37w.

  In the example shown in FIG. 26, the character string indicating the user ID is shown in pear characters, but here it is explained that the color of the character string indicating the user ID is different from the color of the character string indicating the document information 33. To do. That is, in FIG. 26A, the color of the character string indicating the user ID and the color of the character string indicating the document information 33 are the same color black, whereas in FIG. It is preferable to display a character string different from the character string indicating the document information 33 in, for example, light gray. According to this, since it becomes easy to identify the characters of the document information 33, it is possible to prevent the characters of the document information 33 from becoming difficult to recognize when browsing the document information 33.

  FIG. 27 is a fourth diagram for explaining the font of the characters of the watermark form 37w and the document information 33. In the example shown in FIG. 27, the traveling direction of the character string indicating the user ID and the traveling direction of the character string indicating the document information 33 are different.

  27A, the character string indicating the user ID and the character string indicating the document information 33 are in the same direction, whereas in FIG. 27B, the character string indicating the user ID is The character strings indicating the document information 33 are arranged so that the traveling direction thereof is orthogonal. With this arrangement, it is easy to identify the character string indicating the user ID and the character string indicating the document information 33, and it is possible to prevent the characters of the document information 33 from being difficult to recognize when browsing the document information 33. . Here, the angle formed by the direction of progression of the character string indicating the user ID and the direction of progression of the character string indicating the document information 33 is 90 degrees. However, this angle may be 45 degrees. It is only necessary that the character string indicating the user ID is superimposed on the column in an inclined manner.

  Next, a case where a plurality of watermark forms 37w are arranged on the document information 33 will be described. By arranging a plurality of watermark forms 37w, the user ID can be displayed on the document information 33 without any problem. Therefore, for example, when the document information 33 is printed, only the portion of the document information 33 where the user ID is not displayed does not leak to the outside, and the document content of the document information 33 can be protected appropriately.

  Hereinafter, a method of arranging the plurality of watermark forms 37w will be described.

  FIG. 28 is a first diagram illustrating the arrangement of the plurality of watermark forms 37w. Here, it is assumed that the document information 33 is, for example, an English document. In this case, on the page P1 on which the document information 33 is displayed, the start point of the document is at the upper left of the displayed document information 33, and a character string is formed from the start point to the right to form a line. Yes. And when this line increases, a line is added and increased toward the up-down direction on the paper surface.

  Here, considering the probability that a character string exists on the page P1, the probability that a character string exists in the upper left portion of the page P1 is high. That is, as shown in FIG. 28B, when the page P1 is divided into the inclined areas 10, 20, 30, and 40, the probability that the character string indicating the document information 33 exists in the area 10 increases.

  Here, a case will be described in which the vertical and horizontal sides of the page P1 are each divided into three equal parts, and the page P1 is divided into nine grid-like areas 1 to 9. In this case, the probability that a character string exists is the highest in the region 1 that overlaps the region 10, and the probability that a character string exists in the region decreases as the region 2 and the region 3 move from the region 1 to the right. Become. Similarly, the probability that a character string exists in the region decreases as the region 4 and the region 7 progress downward from the region 1. In the region 9 located on the upper right lower side of the page P1, the probability that a character string exists in the region is the lowest.

  Hereinafter, a case where a plurality of watermark forms 37w are arranged in consideration of the existence probability of the character string in each area described in FIG. 28 will be described. FIG. 29 is a second diagram illustrating the arrangement of the plurality of watermark forms 37w.

  FIG. 29A shows an example in which one watermark form 37w is arranged in each of the regions 1 to 9 and the user ID is displayed. In this example, the user ID is also displayed in an area where no character string exists, which may give an impression that the document information 33 is excessively protected to a user who views the document information 33. Absent.

  On the other hand, in FIG. 29B, an example is shown in which one watermark form 37w is arranged in each of region 1, region 2, region 4, and region 5 where there is a high probability that a character string exists, and a user ID is displayed. Show. According to this example, it is possible to protect only the area where the document information 33 is displayed on the page P1, and further, the user who views the document information 33 has an impression that the document information 33 is excessively protected. I don't give it.

  FIG. 30 is a third diagram for explaining the arrangement of the plurality of watermark forms 37w. FIG. 30 shows an example in which the watermark form 37w is arranged in the region 1, the region 5, and the region 9 located on the diagonal line on the page P1. As described above, when the user ID is displayed in the diagonally arranged area, the probability that the character string indicating the document information 33 and the character string indicating the user ID overlap in the order of the area 1, the area 5, and the area 9. Decreases step by step. Therefore, an impression that the document information 33 is excessively protected is not given to a user who browses the document information 33. Further, by displaying the user ID in the region 1 having the highest probability of existence of the character string, the document information 33 can be prevented from leaking to a third party, and the document information 33 can be appropriately protected.

  FIG. 31 is a fourth diagram illustrating the arrangement of the plurality of watermark forms 37w. In FIG. 31, three rows that divide page P1 in the horizontal direction on the page are X rows, Y rows, and Z rows, and three columns that divide page P1 in the vertical direction on the page are A columns, B columns, and C columns. .

  In the example shown in FIG. 31A, the watermark form 37w is arranged in the area 2, the area 4, and the area 9, and the user ID is displayed. In the example shown in FIG. 31, since the document information 33 is an alphabetic character, the starting point of the character string indicating the document information 33 comes in the area 1 located at the upper left in the page P1. For this reason, there is a high possibility that the viewpoint of the user viewing the document information 33 is concentrated in the area 1, and it is preferable that the character string indicating the document information 33 is easily identified in the area 1.

  Therefore, in the example shown in FIG. 31A, the watermark form 37w is not arranged in the area 1, but the watermark form 37w is arranged in the area 2 and the area 4 where the existence probability of the character string in the area is relatively high. . In FIG. 31A, at least one watermark form 37w is arranged in each of the columns A, B, and C, and at least one watermark form is arranged in each of the X, Y, and Z rows. 37w was arranged.

  In this way, even when the document information 33 displayed on the page P1 is, for example, a drawing displayed on the entire page, the user ID can be displayed evenly within the page. Therefore, for example, document information can be prevented from leaking to the outside due to, for example, part of the page being cut off, and the document information can be appropriately protected against a third party.

  FIG. 31B is a diagram showing an example in which the character string indicating the document information 33 advances in the vertical direction like, for example, a Japanese sentence, and the lines of the character string increase from the right side to the left side. In this case, since the starting point of the character string indicating the document information 33 goes to the area 3, the watermark form 37w is not arranged in the area 3. Then, one watermark form 37w is arranged in each of the areas 2 and 6 where the existence probability of the character string in the area is relatively high, and the user ID is displayed. The watermark form 37w is also arranged in the region 7 so that at least one watermark form 37w is arranged in each row and each column. Here, since the character string indicating the document information 33 proceeds in the vertical direction, the character string indicating the user ID is displayed so as to proceed in the horizontal direction.

  FIG. 31C shows an example in which the character string indicating the document information 33 advances from the upper right to the left in the horizontal direction on the page P1 like Persian, for example, and the line of the character string increases from the top to the bottom. FIG. In this case, since the starting point of the character string indicating the document information 33 goes to the area 3 as in FIG. 31B, the watermark form 37w also includes each area on the page P1 as in FIG. 31B. Arranged. At this time, since the character string indicating the document information 33 proceeds in the horizontal direction, the character string indicating the user ID is displayed so as to proceed in the vertical direction.

  FIG. 32 is a fifth diagram illustrating the arrangement of the plurality of watermark forms 37w. In FIG. 32, the page P2 is divided into three columns of A column, B column, and C column in the vertical direction, and divided into four rows of H row, I row, J row, and K row in the horizontal direction. Is divided into 12 grid-like regions. Also in the example shown in FIG. 32, the document information 33 is in English as in FIG. 32, similarly to FIG. 31, the watermark form 37w is not arranged in the area 1 where the start point of the character string indicating the document information 33 comes. Furthermore, in the example shown in FIG. 32, the watermark form 37w is not arranged in the regions 5 and 6 that are located in the center of the page P2 and have a relatively high probability of character strings in the region. As a result, when browsing the document information 33, it is possible to easily grasp the entire document contents and prevent the characters of the document information 33 from being difficult to recognize.

  Also in the example shown in FIG. 32, similarly to the example shown in FIG. 31, the watermark form 37w is arranged so that the user ID is displayed in at least one area in each of the A column, the B column, and the C column. did. In each of the H line, the I line, the J line, and the K line, the watermark form 37w is arranged so that the user ID is displayed in at least one area. Thus, even when the document information 33 is a drawing or the like displayed on the entire page P2, for example, the user ID is displayed evenly on the page P2, and thus the document information 33 is appropriately protected to a third party. can do.

  Embodiment 2 of the present invention will be described below with reference to the drawings. The electronic document 40 described in the second embodiment is different from the electronic document 30 described in the first embodiment in processing related to user authentication. Other than that, the processing related to the document information concealment control described in the first embodiment and the functions that can be realized by the electronic document 30 described in the first embodiment can be similarly realized by the electronic document 40 in the second embodiment. Therefore, in the second embodiment, description will be given of user authentication processing in the electronic document 40 and functions that can be realized only in the electronic document 40.

  FIG. 33 is a diagram illustrating a data structure of the electronic document 40 stored in the storage medium according to the second embodiment of the present invention. In the electronic document 40 shown in FIG. 33, the same reference numerals as those in FIG. 2 are assigned to the same parts as those in the configuration of the electronic document 30 described in FIG.

  The electronic document 40 includes a data part 31 and a program part 32. The data unit 31 includes document information 33 and document concealment data 35. The program unit 32 includes an authentication program 36, a document concealment control program 37, and a password generation program 38.

  The password generation program 38 will be described below. The password generation program 38 is a program for generating a password according to a determined calculation formula based on the user ID. At the electronic document distribution source, the password generation program 38 is executed by a computer other than the computer 10 and the password based on the user ID of the user to whom the electronic document 40 is distributed is generated in advance. The electronic document distribution source distributes the user ID and the password generated by the password generation program 38 to the user in advance as authentication data. In the electronic document 40, an authentication program is executed based on authentication data distributed to the user.

  FIG. 34 is a flowchart for explaining user authentication processing and document concealment control processing in the electronic document 40. When the user ID and password are input to the ID form 37a and the password form 37b, the application 18 causes the password generation program 38 to be executed. The password generation program 38 causes the arithmetic processing unit 11 to execute a process for generating a password based on the input user ID.

  In S181, the arithmetic processing unit 11 starts a process of converting the character of the input user ID into a character code corresponding to each character. In S <b> 182, the arithmetic processing unit 11 determines whether all characters of the input user ID have been converted into corresponding character codes.

  In S183, the arithmetic processing unit 11 converts the characters of the user ID into character codes corresponding to the characters in order from the first character. In S184, the arithmetic processing unit 11 adds the character code converted so far and the character code converted in S183. In S185, the arithmetic processing unit 11 repeats this process for the number of characters of the user ID.

  In S182, when the arithmetic processing unit 11 determines that all the characters of the input user ID have been converted into the corresponding character codes, the processing of the password generation program 38 is terminated. In this way, a password based on the input user ID is generated.

  Upon receiving the end of the password generation program 38, the application 18 causes the arithmetic processing unit 11 to execute the authentication program 36 next. In S186, the arithmetic processing unit 11 determines whether or not the password generated in S185 matches the password input in the password form 37b. If these passwords match, it is assumed that the arithmetic processing unit 11 has authenticated the user, and the processing of the authentication program 36 is terminated.

  Upon receiving the end of the authentication program 36, the application 18 causes the arithmetic processing unit 11 to execute the document concealment control program 37. In S187, the arithmetic processing unit 11 performs document information concealment control so that the user can browse the user ID and the document information. Since the process of S187 is as described in the first embodiment, a description thereof is omitted here.

  The password generation process in the password generation program 38 will be specifically described below. For example, a case where the input user ID is aaa@aaa.com will be described. Here, the character code corresponding to “a” is 61h, similarly, the character code corresponding to “@” is 40h, the character code corresponding to “.” Is 2Eh, the character code corresponding to “c” is 63h, “o” The character code corresponding to “6” is 6Fh, and the character code corresponding to “m” is 6Dh.

  In this embodiment, the sum obtained by adding these character codes is 3F3h, and this is the password generated by the password generation program 38. When the user inputs a decimal number “1011” corresponding to 3F3h to the password form 37b, the password generated by the password generation program 38 matches the password input by the user.

  Here, in the password generation program 38, as the number of characters of the user ID input to the ID form 37a is smaller, the calculation formula in the password generation processing becomes simpler, and the safety of the calculation formula may not be maintained. Therefore, in this embodiment, the user ID provided to the user in advance is 8 characters or more.

  The password generation program 38 causes the arithmetic processing unit 11 to execute a process for determining the number of characters of the user ID before starting the password generation process. FIG. 35 is a flowchart for describing processing for determining the number of characters of a user ID. In S191, the arithmetic processing unit 11 determines whether the number of characters of the user ID input to the ID form 37a is 8 characters or more. When the input user ID is less than 8 characters, in S192, the arithmetic processing unit 11 deletes the user ID and password input to the ID form 37a and the password form 37b.

  When it is determined in S191 that the user ID is 8 characters or more, the arithmetic processing unit 11 ends the process of determining the number of characters of the user ID, and proceeds to the password generation process shown in S181 to S185 of FIG.

  In this way, by generating a password from the input user ID, the user can be authenticated even if the authentication data is not embedded in the electronic document. Therefore, even when there are a large number of electronic document distribution destinations, there is no need to embed authentication data for each distribution destination in the electronic document. Therefore, the same electronic document can be provided to a number of distribution destinations without increasing the size of the electronic document 40. Furthermore, the distribution source of the electronic document reduces the burden of managing authentication data for the user who is the distribution destination.

  The password generation program 38 may generate a password based on the user ID and time information when generating the password. In this case, the distribution source of the electronic document 40 determines in advance a browsable period during which the electronic document 40 can be browsed. Then, the distribution source of the electronic document 40 distributes a password that is valid only during the viewable period, in which time information related to the viewable period is incorporated, to the user.

  FIG. 36 is a flowchart for explaining password generation processing based on the user ID and time information. The processing from S201 to S205 is the same as the processing from S181 to S185 in FIG.

  In S206, the arithmetic processing unit 11 adds the time information when the password is input to the password form 37b and the character code obtained by converting the characters of the user ID, generates a password having the time information, and ends the password generation processing. . Upon receiving the end of the password generation process, the application 18 causes the arithmetic processing unit 11 to execute the authentication program 36 next.

  In S207, the arithmetic processing unit 11 determines whether or not the password in which the time information related to the browseable period input in the password form 37b is incorporated matches the password generated in S206. If these passwords match, the arithmetic processing unit 11 assumes that the user has been authenticated, and ends the processing of the authentication program 36.

  Upon receiving the end of the authentication program 36, the application 18 causes the arithmetic processing unit 11 to execute the document concealment control program 37. In S208, the arithmetic processing unit 11 performs document information concealment control so that the user can browse the user ID and the document information. Since the process of S208 is as described in the first embodiment, a description thereof is omitted here.

  This process will be described below with a specific example.

  For example, it is assumed that the browsing period of the electronic document 40 for the user ID aaa@aaa.com is one year of 2005. At this time, the password generation program 38 has a calculation formula for converting the time information “2005” into a code “3026”.

  In this case, a password including “3026”, which is a time information code indicating 2005, is distributed to the user having the user ID aaa@aaa.com by the distribution source. Therefore, in 2006, the password of the user having the user ID aaa@aaa.com does not match the password generated by the password generation program 38, and the user cannot view the electronic document 40.

  As described above, since the password that can be used in 2005 cannot be used after 2006, even if the password is leaked, the electronic document 40 is browsed with the leaked password after a predetermined time has passed. I can't do that.

  Here, in the electronic document 40, it may be displayed that the password is invalid because the viewable period has passed. FIG. 37 is a screen transition diagram for explaining a case where the viewable period has passed in the electronic document 40.

  In FIG. 37 (A), when a password usable in 2005 is entered in the password form 37b after 2006, the password is generated by the password generation program 38 by the arithmetic processing unit 11 as described above. It is determined that it does not match the entered password. Then, the arithmetic processing unit 11 displays a message that the input password is invalid as shown in FIG. Here, this message is preferably displayed in the vicinity of the ID form 37a or the password form 37b.

  Further, in the electronic document 40, when an invalid password is input, a new password supply source may be presented to the user. That is, when it is determined that the password input by the arithmetic processing unit 11 does not match the password generated by the password generation program 38, the contact information of the new password supplier is displayed as shown in FIG. To do. This contact information may be, for example, a Web site URL from which a new password can be acquired, or a telephone number of a distribution source of the electronic document 40.

  As described above, in the electronic document stored in the storage medium of the first embodiment, user authentication can be performed without depending on the function of an external device or other application, and only a specific user can view it. Can be distributed. As a result, even if the document information is highly confidential, it is possible to prevent leakage to a third party.

  Further, by displaying the user ID on the electronic document, it is possible to specify the user who viewed the electronic document, and even if the electronic document leaks to a third party, the source of the leak can be traced.

  Furthermore, by embedding a plurality of authentication data in the electronic document, even when the same electronic document is distributed to a plurality of users, user authentication processing can be performed corresponding to the authentication data for each user. For this reason, even if the same electronic document is distributed to a plurality of users, the risk of document information leaking can be reduced. Also, the electronic document issuer need not create a different electronic document for each user.

  In the electronic document stored in the storage medium according to the second embodiment, by generating a password from the input user ID, the user can be authenticated even if the authentication data is not embedded in the electronic document. Therefore, even when there are a large number of electronic document distribution destinations, it is not necessary to embed authentication data for each distribution destination in the electronic document, and the same electronic document can be distributed to a large number of distribution destinations without increasing the size of the electronic document. Can be provided to. Furthermore, the distribution source of the electronic document reduces the burden of managing authentication data for the user who is the distribution destination.

  Embodiment 3 of the present invention will be described below with reference to the drawings. The electronic document 50 described in the third embodiment is different from the electronic document 30 and the electronic document 40 described in the first and second embodiments in the process related to user authentication. In addition, the processing related to the document information concealment control described in the first and second embodiments and the functions that can be realized by the electronic document 30 and the electronic document 40 described in the first and second embodiments are described in the third embodiment. The electronic document 50 can be similarly realized. Therefore, in the third embodiment, a description will be given of processing related to user authentication in the electronic document 50 and functions that can be realized only in the electronic document 50.

  FIG. 38 is a diagram showing a data structure of the electronic document 50 stored in the storage medium according to the third embodiment of the present invention. In the electronic document 50 shown in FIG. 38, the same parts as those in the configuration of the electronic document 30 described in FIG.

  The electronic document 50 includes a data part 31B and a program part 32A. The data part 31B has document information 33 and document concealment data 35, and the program part 32A has a document concealment control program 37.

  In the electronic document 50, the document concealment control program 37 performs control to display the document information 33 so as to be viewable to the user when an instruction to cancel the document concealment is given. FIG. 39 is a diagram illustrating an example of screen transition of the electronic document 50.

  The electronic document 50 has a check form 37t, which is a concealment release finger input field in which an instruction to release concealment of the document information 33 is input. In the electronic document 50, for example, the user may input a concealment release instruction for the document information 33 by clicking a pointer such as a mouse on the check form 37t and clicking. Also, the electronic document 50 shown in FIG. 39 is preliminarily embedded with time information related to an expiry date for which the electronic document 50 can be browsed, and has a time limit form 38t for displaying the expiry date. In this time limit form 38t, when a document concealment release instruction is input to the check form 37t, an expiration date for viewing the electronic document 50 is displayed.

  When the electronic document 50 is composed of a plurality of pages, the check form 37t may be arranged on the second page and thereafter. The example shown in FIG. 39 is an example in which the check form 37t is arranged on the second and subsequent pages. The first page displays document information 33K that is open to the public and is always visible. . A check form 37t is arranged on the second page. Further, a time limit form 38t and a shadow form 38s are arranged on the third page, and a time limit form 38t and a content form 37c are arranged on the fourth page.

  FIG. 39A shows a state before the concealment release instruction is input to the check form 37t. That is, in FIG. 39A, since the display attribute of the shadow form 38s is displayed and the display attribute of the content form 37c is not displayed, the document information 33 is invisible, and the user Cannot browse. The expiration date is not displayed on the time limit form 38t. At this time, the document information 33K is not concealed and is visible, and can be browsed by the user.

  Here, when a document concealment release instruction is input to the check form 37t, the electronic document 50 transitions to the state shown in FIG. In other words, the document concealment control program 37 receives this concealment release instruction, and causes the arithmetic processing unit 11 to switch the display attribute of the shadow form 38s from display to non-display and display the display attribute of the content form 37c from non-display. The process to switch to is executed. Further, the document concealment control program 37 causes the calculation processing unit 11 to execute processing for displaying the expiration date on the time limit form 38t. Therefore, in FIG. 39B, the document information 33 becomes visible, and the expiration date is displayed on the time limit form 38t.

  Thus, by displaying the expiration date, it is possible for the user to grasp the period during which the electronic document 50 can be viewed. In addition, by arranging the check form 37t on the second and subsequent pages of the pages constituting the electronic document 50, document information that can be disclosed to the public that does not require concealment control on the page before the check form 37t is arranged. Can be displayed. According to such a configuration, document information with no confidentiality and document information with confidentiality can be mixed in one electronic document 50.

  This arrangement can also be realized in the electronic document 30 and the electronic document 40 described in the first and second embodiments. FIG. 40 is a diagram for explaining an example in which the arrangement of the third embodiment is applied to the electronic documents of the first and second embodiments. Also in the electronic document of FIG. 40, the publicly available document information 33K is arranged on the first page, and the ID form 37a and the password form 37b are arranged on the second page, as in the electronic document 50 of FIG. The watermark form 37w and the shadow form 38s are arranged on the eyes, and the watermark form 37w and the content form 37c are arranged on the fourth page to control the concealment of the document information 33.

  In FIG. 40A, an appropriate user ID and password are not entered in the ID form 37a and the password form 37b, and the user authentication is not performed. The document information 33 is stored in the shadow form 38s and the content form 37c. It is invisible. The user ID is not displayed on the watermark form 37w. Here, since the document information 33K is not concealed, the document information 33K is visible so that the user can view it.

  When user authentication is performed here, the electronic document transitions to the state shown in FIG. That is, the document information 33 is visible and can be browsed, and the user ID is assigned to the watermark form 37w and displayed. At this time, the document information 33K continues to be visible.

  In FIG. 39 and FIG. 40, an example has been described in which document information 33K that may be disclosed to the public and that is not confidential is arranged on only one page. However, the present invention is not limited to this arrangement. That is, the document information 33K may be arranged over a fractional page, and the check form 37t, the ID form 37a, the password form 37b, and the confidential document information 33 are arranged on the page after the document information 33K ends. It should be.

  Further, in the vicinity of the check form 37t, a consent condition for browsing the document information 33 having confidentiality may be displayed. FIG. 41 is a diagram illustrating an example in which the acceptance condition is displayed. The consent condition here is, for example, a description that document contents are not leaked when confidential document information is browsed. In the electronic document 50, when the user receives the acceptance condition and checks the check form 37t to indicate that he / she has agreed to the acceptance condition, this is regarded as an instruction to release the document concealment.

  FIG. 41A shows a state before an instruction to cancel document concealment is issued. In FIG. 41A, in the vicinity of the check form 37t, a document 33S in which the above-described consent condition for document browsing is displayed. The document 33S preferably has a display attribute that can be switched between display and non-display. At this time, the display attribute of the shadow form 38s is in a display state, and the document information 33 is invisible.

  Here, the user who wants to browse the document information 33 checks the check form 37t when he / she agrees with the document 33S in which the acceptance condition is written. Here, the check indicates that the pointer is clicked on the check form 37t. This check functions as a document concealment release instruction.

  In response to this instruction, the document concealment control program 37 causes the arithmetic processing unit 11 to execute a process of hiding the display attribute of the shadow form 38s and hiding the display attribute of the document 33S. Then, as shown in FIG. 41B, the display attributes of the document S and the shadow form 38s are not displayed, and the document information 33 is visible.

  In this way, by displaying the consent condition for document viewing in the vicinity of the check form 37t, the document information 33 can be viewed by the user only when the user who is the viewer agrees to the consent condition. it can.

  Further, in the electronic document 50, when an instruction to cancel the concealment of the document is input to the check form 37t after the expiry date for browsing the electronic document 50 has passed, it indicates that the expiry date has passed, You may display the contact information of the distribution source such as an electronic document with a time limit. FIG. 42 is a diagram for explaining a case where the valid period for browsing the electronic document 50 has expired.

  In FIG. 42A, when the date and time when the instruction to cancel the document concealment is input to the check form 37t has not passed the preset expiration date in the electronic document 50, the document concealment control program 37 11 causes the document information 33 to be visible. Thereby, as shown in FIG. 42 (B), the document information 33 becomes visible and visible.

  In FIG. 42 (A), when the date and time when the document concealment cancellation instruction is input to the check form 37t has passed after the expiration date, as shown in FIG. 42 (C), the document concealment control program 37 The arithmetic processing unit 11 is caused to execute a process of keeping the document information 33 in an invisible state and displaying a distribution source contact information such as a new electronic document. Then, as shown in FIG. 42C, the contact information of the distribution source of the new electronic document or the like is displayed while the document information 33 remains invisible.

  Here, the contact information may be a URL or a telephone number. For example, when the contact address is a URL, the content of the URL may be displayed when the displayed URL is clicked. From this URL, for example, a new electronic document whose password is updated, a password, or the like may be obtained by downloading data.

  In addition, in the electronic document 50, when an instruction for releasing the document concealment is input to the check form 37t after a preset date, a warning message indicating the possibility that the document content of the electronic document 50 has been updated is displayed. May be. FIG. 43 is a diagram for explaining a case where an attention sentence is displayed in the electronic document 50.

  In FIG. 43A, when the date and time when the instruction to cancel the document concealment is input to the check form 37t is before the date and time set in advance in the electronic document 50, the document concealment control program 37 sends the arithmetic processing unit 11 A process of making the document information 33 visible is executed. Thereby, as shown in FIG. 43 (B), the document information 33 becomes visible and visible.

  In FIG. 43A, when the date and time when the instruction to release the document concealment is input to the check form 37t is after the date and time set in advance in the electronic document 50, the document concealment control program 37 sends the arithmetic processing unit 11 A process of making the document information 33 visible and a process of displaying an attention sentence indicating that the document content may be updated are executed. Here, the notice text may include a contact information for obtaining updated document contents.

  The contact information may be, for example, a URL or a telephone number, like the contact information described in FIG. For example, when the contact information is a URL, the content of the URL may be displayed by clicking the URL.

  In addition, the preset date and time may be set to the date and time before the electronic document 50 is distributed, that is, the date and time before the electronic document 50 is delivered to the user. Thereby, when the user browses the electronic document 50, the possibility of updating the document content is always suggested, and the user can be always informed of the contact information related to the document content update.

  According to such a configuration, even after the document content is updated, it is possible to prevent the user who is a viewer from continuing to browse the old document content without noticing that the document content has been updated.

  Further, in the electronic document 50, the document information 33 may be concealed again after a predetermined time elapses after the instruction to cancel the concealment is input to the check form 37t. FIG. 44 is a diagram for explaining a case where a predetermined time has elapsed after the instruction to cancel the concealment is input in the electronic document 50.

  In FIG. 44A, when an instruction to cancel document concealment is input to the check form 37t, the document information 33 becomes visible so that the user can view it, as shown in FIG. Here, when a predetermined time set in advance from the state of FIG. 44B has elapsed, the document concealment control program 37 switches the display attribute of the shadow form 38s from non-display to display again in the arithmetic processing unit 11, and the document. The process of concealing the information 33 and making it invisible is executed. Further, the document concealment control program 37 causes the arithmetic processing unit 11 to execute a process of displaying that a predetermined time set in advance has elapsed. This state is the state shown in FIG.

  At this time, in the state of FIG. 44C, the electronic document 50 transitions to the state of FIG. 44B when a document concealment release instruction is input again, and the document information 33 can be viewed. Is done. As described above, the document information 33 is not made visible for a predetermined time or longer. For example, when the user leaves the electronic document 50 in a state in which the document information 33 is displayed in a visible state, the third party is illegal. It is possible to prevent the document information 33 from being browsed or printed.

  Embodiment 4 of the present invention will be described below with reference to the drawings. The electronic document 60 described in the fourth embodiment is a combination of the functions of the electronic document described in the first to third embodiments. In the electronic document 60, user authentication is performed by the ID form 37a, the password form 37b, and the check form 37t, and concealment control of the document information 33 is performed based on the result of the user authentication.

  FIG. 45 is a first diagram illustrating an example of screen transition of the electronic document 60. The electronic document 60 shown in FIG. 45 includes a plurality of pages, and an ID form 37a, a password form 37b, and a check form 37t are arranged on the first page. On the second and subsequent pages, a watermark form 37w, a shadow form 38s, and a time limit form 38t are arranged.

  Here, FIG. 45A shows a state where user authentication is not performed. In the electronic document 60, when the correct user ID and password are input, the user is authenticated by the authentication program, and when the instruction to cancel the concealment of the document information 33 is input to the check form 37t, the user authentication is assumed to be completed. The document information concealment release process is performed by the concealment control program 37, and the state transitions to the state shown in FIG. Here, in the case where no concealment release instruction has been given only by user authentication based on the user ID and password, or in the case where only the concealment release instruction has been input, it is assumed that user authentication has not been completed, and the electronic document The state 60 maintains the state shown in FIG. 45A and does not transition to the state shown in FIG.

  When the user authentication is completed in the state of FIG. 45A, the document concealment control program 37 causes the arithmetic processing unit 11 to display the shadow form 38s from the display attribute and hides the user ID in the watermark form 37w. Is substituted and displayed, and the time limit form 38t is displayed with a process for displaying an expiry date for viewing the electronic document 60. The state in which these processes are executed is the state shown in FIG.

  In FIG. 45B, the user ID is displayed on the watermark form 37w, and the expiration date for viewing the electronic document 60 is displayed on the time limit form 38t. The document information 33 is in a visible state that can be browsed by the user.

  FIG. 46 is a second diagram illustrating an example of screen transition of the electronic document 60. In the electronic document 60 shown in FIG. 46, when only a document concealment release instruction is input, a part of the document information 33 is displayed so as to be viewable. In the example shown in FIG. 46, an ID form 37a, a password form 37b, and a check form 37t are arranged on the first page of the electronic document 60, and a watermark form 37w, a shadow form 38s3, and a shadow form 38s4 are provided on and after the second page. Has been placed.

  FIG. 46A shows a state before user authentication. Here, when only an instruction to cancel the document concealment is input to the check form 37t, the document concealment control program 37 causes the arithmetic processing unit 11 to execute a process of switching the display attribute of the shadow form 38s3 from display to non-display. Then, the electronic document 60 is in the state shown in FIG. That is, the document information 33h hidden by the shadow form 38s3 is displayed in a visible state that can be viewed by the user. At this time, since the user ID is not input, the watermark form 37w remains hidden.

  In FIG. 46A, when the correct user ID and password are input to the ID form 37a and the password form 37b to authenticate the user, and when an instruction to cancel the document concealment is input to the check form 37t, the document concealment control program 37 Then, the arithmetic processing unit 11 is caused to execute a process of switching the display attributes of the shadow form 38s3 and the shadow form 38s4 from display to non-display. Further, the document concealment control program 37 causes the arithmetic processing unit 11 to execute a process of substituting and displaying the user ID input to the watermark form 37w.

  Then, the electronic document 60 is in the state shown in FIG. That is, the document information 33h concealed by the shadow form 38s3 and the document information 33i concealed by the shadow form 38s4 are displayed in a visible state that can be viewed by the user.

  According to such a configuration, it is possible to selectively make the divided document information visible in response to information input at the time of user authentication. Therefore, for example, more confidential document information may be made visible only when user authentication is performed using a user ID and password and an instruction to cancel document concealment is input from the check form 37t.

  FIG. 47 is a third diagram illustrating an example of screen transition of the electronic document 60. 47, similarly to the electronic document 60 described with reference to FIG. 46, the divided document information is selectively made visible according to the information input at the time of user authentication. In the example shown in FIG. 47, the check form 37t is arranged on the first page of the electronic document 60, the shadow form 38s5 on the second page, the ID form 37a and the password form 37b on the third page, and the fourth page. A watermark form 37w and a shadow form 38s6 are arranged.

  FIG. 47A shows a state before user authentication. In FIG. 47A, when a document concealment release instruction is input to the check form 37t, the document concealment control program 37 performs processing for switching the display attribute of the shadow form 38s5 from display to non-display in the arithmetic processing unit 11. Let it run. Then, as shown in FIG. 47B, the electronic document 60 is displayed in a visible state in which the document information 33j hidden in the shadow form 38s5 can be viewed by the user. At this time, since the document information displayed on page 4 is hidden by the shadow form 38s6, the user cannot view it.

  FIG. 48 is a fourth diagram illustrating an example of screen transition of the electronic document 60. FIG. 48 shows a case where a user ID and a password are input to the electronic document 60 described in FIG. FIG. 48A shows a state similar to that in FIG. In FIG. 48A, when the correct user ID and password are input to the ID form 37a and the password form 37b arranged on the third page, the document concealment control program 37 sends the shadow form 38s6 to the arithmetic processing unit 11. The process of switching the display attribute from display to non-display and the process of assigning and displaying the user ID input to the watermark form 37w are executed.

  Then, as shown in FIG. 48B, the electronic document 60 is displayed in a visible state in which the document information 33l concealed by the shadow form 38s6 and the user ID of the watermark form 37w are visible to the user. The At this time, the display attribute of the shadow form 38s5 arranged on the second page remains displayed, and the document information 33j is in an invisible state that cannot be viewed by the user.

  FIG. 49 is a fifth diagram illustrating an example of screen transition of the electronic document 60. FIG. 49 shows a case where a user ID, a password, and a document concealment release instruction are input to the electronic document 60 described with reference to FIG. FIG. 49A shows a state similar to that in FIG. In FIG. 49A, a document concealment release instruction is input to the check form 37t disposed on the first page, and a user ID and password are input to the ID form 37a and password form 37b disposed on the third page. Then, the document concealment control program 37 substitutes the processing unit 11 for switching the display attributes of the shadow form 38s5 and the shadow form 38s6 from display to non-display and the user ID input to the watermark form 37w. Execute the process to be displayed.

  Then, as shown in FIG. 49 (B), the electronic document 60 displays the document information 33j hidden by the shadow form 38s5 and the document information 33l hidden by the shadow form 38s6 in a visible state that can be viewed by the user. Is done. The input user ID is displayed on the watermark form 37w.

  In the electronic document 60 described with reference to FIGS. 47 to 48, a document 33 </ b> S (FIG. 33), which is a document in which an acceptance condition related to browsing of the document information 33 is described, is near the check form 37 t arranged on the first page. 41) is preferably displayed. If the document 33S is displayed in the vicinity of the check form 37t, when viewing the document information 33j, the user can browse the document information 33j after allowing the user to agree to accept the acceptance condition.

  The document 33S may be similarly arranged on the third page in the electronic document 60. FIG. 50 is a diagram illustrating an example in which the acceptance condition is displayed in the electronic document 60.

  In the electronic document 60 shown in FIG. 50, a document 33S in which an acceptance condition related to document browsing is described is arranged in the electronic document 60 described in FIG. In the example shown in FIG. 50, the document 33S is arranged and displayed near the check form 37t on the first page and near the ID form 37a on the third page.

  FIG. 50A shows a state before user authentication, and the document 33S is displayed on the first and third pages. When a check is input to the check form 37t and a user ID and password are input to the ID form 37a and the password form 37b, the document information 33j and the document information 33l transition to the state shown in FIG. To do.

  At this time, the document 33S displayed on the first page and the third page maintains the displayed state, and is continuously displayed even in the state shown in FIG. In this way, by arranging the acceptance condition in the vicinity of the authentication data input field, the user can be made aware of the condition for viewing the document information. At this time, the consent condition for browsing the document information 33j is described in the document 33S displayed on the first page, and the document 33S displayed on the third page is used for browsing the document information 33l. Acceptance conditions may be described.

  Although the present invention has been described based on each embodiment, the present invention is not limited to the requirements shown in the above embodiment. With respect to these points, the gist of the present invention can be changed without departing from the scope of the present invention, and can be appropriately determined according to the application form.

  The present invention can be applied to a storage medium in which an electronic document requiring user authentication is stored.

It is an example of the hardware block diagram of the computer 10 which implement | achieves the document processing apparatus which can read the storage medium 20 of this invention. It is an example of the figure which shows the data structure of the electronic document 30 memorize | stored in the storage medium of Example 1 of this invention. 4 is an example of a screen transition diagram of the electronic document 30. FIG. FIG. 4 is a flowchart for explaining user authentication processing and document concealment control processing in the electronic document 30. 5 is a flowchart for explaining user authentication processing and document concealment control processing in the electronic document 30. It is an example of the figure which shows the data structure of 30 A of electronic documents which do not have document concealment data. It is a figure which shows the example of the screen transition of 30 A of electronic documents. It is an example of the figure which shows the state with which multiple types of forms were mixed on the same page in the electronic document 30 which consists of multiple pages. It is an example of a screen transition diagram when performing document concealment control corresponding to a user using a shadow form. It is a flowchart explaining the document concealment control corresponding to the user using a shadow form. It is an example of a screen transition diagram in the case of performing document concealment control corresponding to a user using a content form. It is a flowchart explaining the document concealment control corresponding to the user using a content form. It is a flowchart explaining the process performed in the authentication program 36 when a user ID is input into ID form 37a. It is a flowchart explaining the process performed by an authentication program after a password is input into the password form 37b. It is an example of the 1st screen transition diagram explaining the input restriction | limiting of authentication data. It is an example of the 2nd screen transition diagram explaining the input restriction | limiting of authentication data. It is an example of a screen transition diagram explaining display of a user ID. It is an example of the figure which shows the state where the address and contact address of the inquiry destination of a user ID and a password are displayed. It is an example of the figure explaining the key which accesses an inquiry destination. It is an example of the figure which shows the state as which the inquiry destination containing user specific information was displayed. It is an example of a screen transition diagram when storing the electronic document 30. 4 is a flowchart for explaining document information concealment control based on time information in the electronic document 30; It is an example of the figure which shows the state by which the watermark form 37w has been arrange | positioned in the position which can be concealed with the shadow form 38s. It is an example of the figure which shows the state by which the watermark form 37w has been arrange | positioned so that it may overlap with the document information. It is a 1st figure explaining the font of the character of the watermark form 37w and the document information 33. FIG. It is a 2nd figure explaining the font of the character of the watermark form 37w and the document information 33. FIG. It is a 3rd figure explaining the font of the character of the watermark form 37w and the document information 33. FIG. It is the 4th figure explaining the font of the character of watermark form 37w and document information 33. It is the 1st figure explaining arrangement of a plurality of watermark forms 37w. It is a 2nd figure explaining arrangement | positioning of the some watermark form 37w. It is a 3rd figure explaining arrangement | positioning of the some watermark form 37w. It is the 4th figure explaining arrangement of a plurality of watermark forms 37w. It is a 5th figure explaining arrangement | positioning of the some watermark form 37w. It is a figure which shows the data structure of the electronic document 40 memorize | stored in the storage medium of Example 2 of this invention. 6 is a flowchart for explaining user authentication processing and document concealment control processing in the electronic document 40; It is a flowchart explaining the process which determines the number of characters of user ID. It is a flowchart explaining the password production | generation process based on a user ID and time information. FIG. 10 is a screen transition diagram for explaining a case in which a viewable period has passed in the electronic document 40. It is a figure which shows the data structure of the electronic document 50 memorize | stored in the storage medium of Example 3 of this invention. It is a figure which shows the example of the screen transition of the electronic document. 10 is a diagram illustrating an example in which the arrangement of the third embodiment is applied to the electronic document of the first and second embodiments. FIG. It is a figure which shows the example by which consent conditions were displayed. It is a figure explaining the case where the expiration date which can browse the electronic document 50 expires. It is a figure explaining the case where an attention sentence is displayed in the electronic document. It is a figure explaining the case where predetermined time passes, after the instruction | indication of cancellation | release of concealment is input in the electronic document. 6 is a first diagram illustrating an example of screen transition of an electronic document 60. FIG. It is a 2nd figure which shows the example of the screen transition of the electronic document. FIG. 10 is a third diagram illustrating an example of screen transition of the electronic document 60. FIG. 10 is a fourth diagram illustrating an example of screen transition of the electronic document 60. FIG. 10 is a fifth diagram illustrating an example of screen transition of the electronic document 60. It is a figure which shows the example by which consent conditions were displayed in the electronic document.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Computer 11 Operation processing part 12 Display part 15 Input part 18 Application 20 Storage medium 30, 40, 50, 60 Electronic document 31, Data part 32 Program part 33, 33K Document information 34 Authentication data 35 Document concealment data 36 Authentication program 37 Document Concealment control program 38 Password generation program 37a ID form 37b Password form 37c Content form 37t Check form 37w Watermark form 37w
38a Access form 38s Shadow form 38t Time limit form

Claims (31)

In a storage medium in which authentication data for authenticating a user, document information data including text data and / or image data, an authentication program, and a document concealment control program are stored.
The authentication program authenticates a user based on the authentication data,
The document concealment control program performs concealment control of the document information based on a result of executing the authentication program. The authentication data includes document identification data embedded in the storage medium for identifying the document information;
The storage medium according to claim 1, wherein the password is a password corresponding to the document identification data embedded in the storage medium. The authentication program is:
An identification data determination procedure for determining whether the document identification data embedded in the storage medium and the document identification data acquired from the outside match;
3. A password determination procedure for determining whether or not a password corresponding to document identification data embedded in the storage medium matches a password acquired from outside, is executed. The storage medium described in 1. The document hiding control program
Document identification data embedded in the storage medium in the authentication program and document identification data acquired from the outside,
When it is determined that the password corresponding to the document identification data embedded in the storage medium and the password acquired from the outside match,
4. The storage medium according to claim 1, wherein a display switching procedure for displaying the document information is executed. In a storage medium storing document information data including text data and / or image data, a password generation program, an authentication program, and a document concealment control program,
The password generation program generates a password corresponding to the document identification information data based on the document identification data acquired from the outside,
The authentication program authenticates the user based on the password generated by the password generation program and the password acquired from the outside,
The document concealment control program performs concealment control of the document information based on a result of executing the password generation program and the authentication program. The authentication program is:
6. The storage medium according to claim 5, wherein a password determination procedure for determining whether a password generated by the password generation program matches a password acquired from the outside is executed. When the document concealment control program determines that the password generated by the password generation program in the authentication program and the password acquired from the outside match,
7. The storage medium according to claim 5, wherein a display switching procedure for displaying the document information is executed.   8. The password generation program, when the document identification data acquired from the outside satisfies a predetermined condition, causes a password to be generated based on the document identification data. The storage medium according to one item.   9. The password generation program according to claim 5, wherein the password generation program generates a password based on the document identification data acquired from the outside and time information when the document identification data is acquired in a password generation procedure. A storage medium according to claim 1. In a storage medium storing document information data consisting of text data and / or image data and a document concealment program,
The storage medium characterized in that the document concealment program performs concealment control of the document information based on an instruction for canceling document concealment acquired from the outside. The document concealment control program includes authentication data stored in the storage medium for authenticating a user, document information data including text data and / or image data, an authentication program, and a document concealment control program. When memorized in
5. The storage medium according to claim 1, wherein in the display switching procedure, a procedure for hiding the document information is executed. 6. The document concealment control program stores document information data including text data and / or image data, a password generation program, an authentication program, and a document concealment control program stored in the storage medium in an external device. When
10. The storage medium according to claim 5, wherein in the display switching procedure, a procedure for hiding the document information is executed. 11. The document concealment control program includes authentication data stored in the storage medium for authenticating a user, document information data including text data and / or image data, an authentication program, and a document concealment control program. When memorized in
5. The storage medium according to claim 1, wherein in the display switching procedure, a procedure for hiding a part of the document information is executed. 6. The document concealment control program stores document information data including text data and / or image data, a password generation program, an authentication program, and a document concealment control program stored in the storage medium in an external device. When
10. The storage medium according to claim 5, wherein in the display switching procedure, a procedure for hiding a part of the document information is executed. 11. The document concealment control program includes authentication data stored in the storage medium for authenticating a user, document information data including text data and / or image data, an authentication program, and a document concealment control program. When memorized in
The storage medium according to claim 1, wherein the document identification data acquired from the outside is deleted. The document concealment control program stores document information data including text data and / or image data, a password generation program, an authentication program, and a document concealment control program stored in the storage medium in an external device. When
The storage medium according to claim 5, wherein the document identification data acquired from the outside is erased.   The storage medium according to claim 1, wherein the document concealment control program executes a procedure for displaying the document identification data acquired from the outside.   The storage medium according to claim 17, wherein in the procedure of displaying the document identification data acquired from the outside, the document identification data is displayed superimposed on the document information data. Time information indicating an expiration date during which the document information can be browsed is stored,
The storage medium according to claim 1, wherein the document concealment control program executes a procedure for displaying the expiration date.   The storage medium according to any one of claims 1 to 19, wherein the document concealment program executes a procedure for displaying a password inquiry address corresponding to the document identification data. The document concealment program executes a procedure for comparing time information indicating an expiration date during which the document information can be browsed and time information when the document identification data is acquired from the outside,
The procedure for displaying an address of an inquiry destination of a new password corresponding to the document identification data is executed when the time when the document identification data is acquired from the outside has passed the expiration date. The storage medium according to any one of 1 to 19.   The storage medium according to claim 20 or 21, wherein the address of the inquiry destination is a URL, and the URL is embedded. Unique information unique to the document information;
Specific information for identifying a viewer of the document information is generated based on at least one of the authentication data, the unique information, and time information when the storage medium is read into an external device. The storage medium according to any one of claims 1 to 22, wherein a specific information generation program is stored. The authentication data, the document information data, and the document concealment data are each composed of a plurality of data groups,
The storage medium according to any one of claims 1 to 23, wherein the same identifier is assigned to a plurality of pieces of data that realize the same function.   The storage medium according to any one of claims 1 to 24, wherein information indicating an acquisition state of document identification data acquired from the outside or a password acquired from the outside is displayed. The storage medium stores time information,
The document concealment control program displays the document information in the display switching procedure based on time information when the storage medium is read by an external device and the time information stored in the storage medium. The storage medium according to any one of claims 1 to 25. The document information is composed of a plurality of document information,
The storage medium according to any one of claims 1 to 26, wherein the document concealment control program performs concealment control of the document information based on a result of executing the authentication program and an authenticated user. . A document processing apparatus comprising a storage medium reading means, an arithmetic processing means, and an input means,
The storage medium reading means includes
Document identification data for identifying document information, authentication data for authenticating a user, consisting of a password corresponding to the document identification data, document information data consisting of text data or image data, an authentication program, Read the storage medium that stores the document concealment control program,
The arithmetic processing means includes:
Executing the authentication program based on the authentication data input by the input means and the authentication data read by the storage medium reading means, and the authentication data stored in the storage medium;
The document concealment control program performs concealment control of document information based on a result of executing the authentication program. A document processing apparatus comprising a storage medium reading means, an arithmetic processing means, and an input means,
The storage medium reading means includes
Reading a storage medium storing document information data consisting of text data or image data, a password generation program, an authentication program, and a document concealment control program,
The input means inputs document identification data for identifying the document information stored in the storage medium, and a password corresponding to the document identification data,
The arithmetic processing means includes:
Executing the password generation program for generating a password based on the input document identification data;
Based on the password generated by the password generation program and the password corresponding to the input document identification data, execute the authentication program,
The document concealment control program executes concealment control of the document information based on a result of executing the authentication program. A document processing method in a document processing apparatus, comprising a storage medium reading step, an arithmetic processing step, and an input step,
The storage medium reading step includes:
Authentication data for authenticating a user, document information data consisting of text data or image data, and an authentication program, comprising document identification data for identifying document information, a password corresponding to the document identification data Read the storage medium storing the document concealment control program,
The arithmetic processing step includes
Executing the authentication program based on the authentication data input in the input step and the authentication data read in the storage medium reading step, the authentication data stored in the storage medium;
A document processing method, wherein the document concealment control is executed by executing the document concealment control program based on a result of executing the authentication program. A document processing method in a document processing apparatus, comprising a storage medium reading step, an arithmetic processing step, and an input step,
The storage medium reading step includes:
Reading a storage medium storing document information data consisting of text data or image data, a password generation program, an authentication program, and a document concealment control program,
In the input step, document identification data for identifying document information stored in the storage medium and a password corresponding to the document identification data are input,
The arithmetic processing step includes
Executing the password generation program for generating a password based on the input document identification data;
Based on the password generated by the password generation program and the password corresponding to the input document identification data, execute the authentication program,
A document processing method, wherein the document information concealment control is performed by executing the document concealment control program based on a result of executing the authentication program.

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