JP5907288B2 - Information processing apparatus, information processing system, control method, and program - Google Patents

Description

  The present invention relates to encryption of a file attached to an e-mail.

  In recent years, in an e-mail system, e-mail is transmitted and received between client terminals via a network. However, it is used as a very convenient tool for exchanging information with a distant place.

  However, there are many cases in which highly confidential information is included in an e-mail and exchanged with the other party in an emergency or the like. In this case, the transmitted e-mail is sent to the other party's mail server. In the process, eavesdropping and tampering are performed, and there is a risk that highly confidential information cannot be transmitted safely.

  Therefore, a number of methods for encrypting e-mails have been proposed. For example, methods such as PGP (Pretty Good Privacy) and S / MIME (Secure / Multipurpose Internet Mail Extensions) have been proposed. By performing encryption and decryption on both the sending and receiving sides, the aforementioned risks are avoided.

  In order to use such a method, it is necessary to install software that provides functions for performing encryption and decryption for each client terminal. Consideration of the installation of these software (cost and safety) Etc.), installation work, and post-installation setting work, etc., there are some inconveniences for users.

  However, as a method of using electronic mail, there is a method in which information with low or no confidentiality is input in the body of the electronic mail, and a file containing information with high confidentiality is attached to the electronic mail and transmitted.

  In this case, it is not necessary to encrypt all emails as in the above-mentioned method, and it is possible to deal with by encrypting only the files attached to the emails. There is a mechanism for encrypting files attached by an intermediary mail server, etc., but even in such a configuration, a function to encrypt and decrypt both mail servers on the sending and receiving sides is provided. Software that needs to be installed.

Therefore, when an e-mail is transmitted from the internal client to the external client, an e-mail to be transmitted is encrypted and transmitted using a predetermined fixed password, and a notification e-mail including the fixed password is also transmitted. Technology has been presented (see, for example, Patent Document 1).
JP 2009-171542 A

  However, it is normal for persons who frequently exchange e-mails to operate by deciding a password to be used. In the technique described in Patent Document 1, a fixed password is notified to a destination external client. It is shown that one fixed password is notified, and when performing the operation as described above, an unsuitable configuration is taken.

  When the technology described in Patent Document 1 is used, a password for an e-mail transmitted from an internal mail is known to a user who uses this system, and an e-mail is erroneously transmitted to an unexpected user. Risks such as information leakage will occur.

  Furthermore, in the technology described in Patent Document 1, a configuration for automatically generating a password is described, and although it is possible to reduce the risk of information leakage, etc., when performing the operation as described above, This is an unsuitable configuration.

  The present invention has been made in order to solve the above-described problems. An information processing apparatus, an information processing system, and an information processing system capable of improving security while performing flexible operation in sending and receiving e-mails. It is an object to provide a control method and a program.

  A first invention for achieving the above object includes a storage means for storing a password set in a file attached to an e-mail according to the e-mail address, a server mail receiving means for receiving the e-mail, Password setting determination means for acquiring a password corresponding to the destination of the e-mail received by the server mail receiving means from the password stored in the storage means, and the password acquired by the password setting determination means for the attached file A mail generating means for setting, a server mail transmitting means for transmitting the email generated by the mail generating means to the destination, and a password notification email indicating the password acquired by the password setting determining means. A password notification mail generating means; A password notification e-mail transmission unit for transmitting a password notification e-mail generated by the password notification e-mail generation unit to the destination after the e-mail is transmitted by the server e-mail transmission unit, and the password using a password corresponding to the destination Management means for managing a time related to transmission of the password notification e-mail by the notification e-mail transmission means, and the password notification e-mail transmission means is configured to notify the password by the password notification e-mail transmission means managed by the management means. The password notification e-mail is not transmitted until a predetermined period elapses from the time when the e-mail is transmitted. On the other hand, after the elapse of the predetermined period, the transmitted password is generated by the password notification e-mail generation means. In the notification email The information processing apparatus transmits a password notification e-mail indicating a password identical to the displayed password.

  A second invention for achieving the above object is an information processing system in which a plurality of client terminals that perform transmission / reception of electronic mail and an information processing apparatus are connected via a network, wherein the client terminal Client mail sending means for sending an e-mail, client mail receiving means for receiving the e-mail from the server mail sending means, and client notification for receiving the password notification e-mail sent by the password notification mail sending means A mail receiving unit, wherein the information processing apparatus stores a password to be set in a file attached to the e-mail according to a destination of the e-mail, and receives the e-mail from the client mail transmitting unit. Server mail receiving means for receiving and receiving the server mail A password setting determination means for acquiring a password corresponding to the destination of the e-mail received by the means from the password stored in the storage means, and a mail for setting the password acquired by the password setting determination means for the attached file Generating means, server mail transmitting means for transmitting the e-mail generated by the mail generating means to the client terminal specified from the destination, and a password notification e-mail indicating the password acquired by the password setting determining means Password notification mail generating means for generating the password notification mail, and after sending the email by the server mail transmission means, the password notification email sending to the destination the password notification email generated by the password notification mail generation means And a management means for managing a time related to transmission of an email for password notification by the password notification mail transmission means using a password corresponding to the destination, and the password notification mail transmission means includes the password notification mail transmission means, The password notification e-mail is not transmitted until a predetermined period has elapsed from the time when the password notification e-mail is transmitted by the password notification e-mail transmission unit managed by the management unit. An information processing system for transmitting a password notification e-mail indicating a password identical to the password indicated by the transmitted password notification e-mail generated by the password notification e-mail generation means .

  A third invention for achieving the above object is a method for controlling an information processing apparatus for performing transmission / reception processing of an electronic mail, comprising: a server mail receiving step for receiving an electronic mail; and the electronic mail received by the server mail receiving step A password setting determination step for acquiring a password for setting a password corresponding to the mail destination in a file attached to the e-mail from a password stored in a storage means for storing the password according to the e-mail destination, and the password setting determination step. A mail generation step for setting the acquired password for the attached file, a server mail transmission step for transmitting the email generated by the mail generation step to the destination, and a password indicating the password acquired by the password setting determination step A password notification mail generating step for generating a notification email, a password notification for transmitting the password notification email generated by the password notification email generation step to the destination after transmitting the email by the server mail transmission step A mail sending step, and a management step for managing a time related to sending a password notification email by the password notice mail sending step using a password corresponding to the address, wherein the password notice mail sending step comprises the management The password notification e-mail is not transmitted until a predetermined period elapses from the time when the password notification e-mail is transmitted in the password management e-mail transmission step managed by the step. And transmitting a password notification e-mail indicating the same password as the password shown in the transmitted password notification e-mail generated by the password notification e-mail generation step. It is a control method of a processing apparatus.

A fourth invention for achieving the above object is a program that can be read and executed by an information processing apparatus that performs transmission / reception processing of an electronic mail, wherein the server mail receiving means receives the electronic mail, and the server mail receiving means A password setting determining means for obtaining a password for setting a password corresponding to the address of the e-mail received by the file attached to the e-mail from a password stored in a storage means for storing the password according to the e-mail address; A mail generation unit that sets the password acquired by the password setting determination unit for the attached file; a server mail transmission unit that transmits the email generated by the mail generation unit to the destination; and the password setting determination unit. For password notification that shows the acquired password Password notification mail generating means for generating an e-mail, and password notification mail transmission for transmitting the password notification e-mail generated by the password notification mail generating means to the destination after the e-mail is transmitted by the server mail transmitting means And a management means for managing a time related to transmission of an email for password notification by the password notification mail transmission means using a password corresponding to the destination, the password notification mail transmission means, The password notification e-mail is not transmitted until a predetermined period elapses from the time when the password notification e-mail is transmitted by the password notification e-mail transmission unit managed by the management unit. , Password notification email generation Produced by the step is a program for causing to function as transmitting the transmitted e-mail password notification identical to the password of password is shown represented in an email password notification.

  A fifth invention for achieving the above object is a method of controlling an information processing system in which a plurality of client terminals for transmitting and receiving e-mails and an information processing apparatus are connected via a network, wherein the client terminal The client email sending step for sending the email, the client email receiving step for receiving the email sent in the server email sending step, and the password notification email sent in the password notification email sending step. A client notification mail receiving step, wherein the information processing apparatus receives a server mail receiving step for receiving the email sent by the client mail sending step, and a destination of the email received by the server mail receiving step. The password to be set in the file attached to the e-mail, the password setting determining step for acquiring the password stored in the storage means for storing the password according to the destination of the e-mail, the password acquired by the password setting determining step The mail generation step that is set for the attached file, the server mail transmission step that transmits the email generated by the mail generation step to the client terminal specified from the destination, and the password acquired by the password setting determination step is A password notification mail generation step for generating a password notification email to be displayed; an email is transmitted by the server mail transmission step; and then generated by the password notification email generation step. A password notification email sending step for sending a password notification email to the destination, and a management for managing the time involved in sending the password notification email using the password notification email sending step using the password corresponding to the destination The password notification email sending step includes a password notification email until a predetermined period of time elapses from the time when the password notification email transmission step managed in the management step sends the password notification email. On the other hand, after the elapse of a predetermined period, the password notification e-mail in which the same password as the password shown in the transmitted e-mail for password notification is generated by the password notification e-mail generation step is shown. Baa A control method of an information processing system including transmitting a message.

  A sixth invention for achieving the above object is an information processing system in which a plurality of client terminals that perform transmission and reception of electronic mail and an information processing apparatus are connected via a network, wherein the client terminal is connected to the electronic mail. Client mail sending means for sending the password, client mail receiving means for receiving the email from the server mail sending means, and client notification mail reception for receiving the password notification email sent by the password notification mail sending means A server mail receiving means for receiving an email from the client mail sending means, and a password corresponding to a destination of the email received by the server mail receiving means. Set to file attached to email A password setting determination unit that obtains a password to be stored from a password stored in a storage unit according to a destination of the e-mail, and a mail generation that sets the password acquired by the password setting determination unit for the attached file Means, server mail transmission means for transmitting the email generated by the mail generation means to the client terminal specified from the destination, and a password notification email indicating the password acquired by the password setting determination means. A password notification mail generating means for generating; a password notification mail transmitting means for transmitting an email for password notification generated by the password notification mail generating means to the destination after transmitting an email by the server mail transmitting means; The password notification mail transmitting means functions as management means for managing the time related to the transmission of the password notification e-mail using the password corresponding to the address, and the password notification mail transmitting means is the management means The password notification e-mail is not transmitted until a predetermined period elapses from the time when the password notification e-mail is transmitted by the password notification e-mail transmission means managed by the password notification. The program is made to function as transmitting a password notification e-mail showing the same password as the password shown in the transmitted password notification e-mail generated by the notification e-mail generation means.

  According to the present invention, after transmitting an e-mail, by notifying a predetermined password by a destination e-mail address, it is possible to improve security while performing flexible operation in transmitting and receiving e-mail. There is an effect that it is possible.

It is a lineblock diagram showing a schematic structure of an information processing system concerning an embodiment of the present invention. It is a block diagram which shows schematic structure of the hardware of the various terminals which concern on embodiment of this invention. It is a block diagram which shows the function structure in the information processing system which concerns on embodiment of this invention. It is a flowchart which shows the password notification process of the email in the information system which concerns on embodiment of this invention. It is a block diagram which shows the structure of the screen for performing the transmission instruction | indication of the email in the client terminal which concerns on embodiment of this invention. It is a block diagram showing the structure of the screen which shows an example of having notified the predetermined password of the attachment file in the client terminal which concerns on embodiment of this invention. It is a block diagram showing the structure of the screen which shows an example of having notified the automatic generation password of the attachment file in the client terminal which concerns on embodiment of this invention. It is a block diagram which shows the structure of the table used by the password notification process of the email in the information processing system which concerns on embodiment of this invention. It is a block diagram which shows the structure of the table used by the password notification process of the email in the information processing system which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]

  FIG. 1 is a diagram illustrating an example of a system configuration in an information processing system according to an embodiment of the present invention. Note that the configurations of the various terminals shown in FIG. 1 are merely examples, and it goes without saying that there are various configuration examples depending on the purpose and application.

  As shown in FIG. 1, an information processing system 100 according to the present embodiment includes a client terminal 101, an administrator client terminal 102 used by a system administrator, and an internal mail server 104. They are connected to each other via a local area network (LAN) 103 so as to communicate with each other, and are constructed as an internal system.

  The client terminal 101 is connected to at least one or more external mail servers 106 via the wide area network 105 so that they can communicate with each other. A firewall device (not shown) is installed between the LAN 103 and the wide area network 105, and communication control processing is performed according to a predetermined rule.

  The internal mail server 104 is a server device for relaying electronic mail by the client terminal 101. The internal mail server 104 specifies the SMTP communication content of the client terminal 101 and performs various processes described later according to the communication content.

  The administrator client terminal 102 sets and manages the internal mail server 104.

  Next, the hardware configuration of various terminals of the internal mail server 104 shown in FIG. 1 will be described with reference to FIG. Note that the client terminal 101 and the administrator client terminal 102 have the same configuration, and a description thereof will be omitted.

  The CPU 201 comprehensively controls each device and controller connected to the system bus 204. In addition, the ROM 202 or the external memory 211 is provided with a BIOS (Basic Input / Output System) or an operating system program (hereinafter referred to as an OS), which is a control program for the CPU 201, or a function executed by each server or each client device. Various necessary programs to be described later are stored.

  The RAM 203 functions as a main memory, work area, and the like for the CPU 201. The CPU 201 implements various operations by loading a program necessary for execution of processing into the RAM 203 and executing the program.

  An input controller (input C) 205 controls input from an input unit 209 indicating a pointing device such as a keyboard or a mouse (not shown). A video controller (VC) 206 controls display on a display device such as a CRT display (CRT) 210. The display device may be a liquid crystal display as well as a CRT.

  A memory controller (MC) 207 is a hard disk (HD), floppy disk (registered trademark FD) or PCMCIA card slot for storing boot programs, browser software, various applications, font data, user files, editing files, various data, and the like. Controls access to an external memory 211 such as a CompactFlash (registered trademark) memory connected via an adapter.

  A communication I / F controller (communication I / FC) 208 is connected to and communicates with an external device via a network, and executes communication control processing in the network. For example, Internet communication using TCP / IP is possible.

  Note that the CPU 201 enables display on the display device 210 by executing outline font rasterization processing on a display information area in the RAM 203, for example. Further, the CPU 201 enables a user instruction with a mouse cursor (not shown) on the display device 210.

  A program or the like for executing a password notification mail transmission process for realizing the present invention is stored in the external memory 211 and is executed by the CPU 201 by being loaded into the RAM 203 as necessary.

  Definition information and various information tables used in the password notification mail transmission process according to the present invention are also stored in the external memory 211. Detailed description thereof will be described later.

  FIG. 3 is a schematic diagram illustrating a functional configuration according to the information processing system 100, and an outline of each function will be described. The contents of each function will be described in conjunction with the flowchart shown in FIG.

  As illustrated in FIG. 3, the client terminal 101 includes a client mail transmission unit 301, and the client mail transmission unit 301 is connected to the internal mail server 104 via the LAN 103.

  The client mail transmission unit 301 has a function realized by software for instructing transmission of an electronic mail. For example, the client mail transmission unit 301 displays a mail creation screen 500 shown in FIG. 209, a destination 501 indicating an e-mail transmission destination address, a CC (Carbon Copy) 502, a subject 503 indicating an e-mail title, an e-mail body 504, and an attachment indicating a file attached to the e-mail Input or attach to the file 505 or the like.

  When the user transmits an e-mail, the user presses a send button 506 provided on the e-mail creation screen 500 to send the e-mail created using the input unit 209 to the destination 501 and CC 502 set. Send to the destination address.

  The mail creation screen 500 also includes an attachment button 507, and the user designates a file existing in the client terminal 101 by pressing the attachment button 507 when attaching the attachment file 505 to the e-mail. A display screen (not shown) is displayed on the display device 210, and a file to be attached is attached to an e-mail by selecting and specifying from the file displayed on the screen using the input unit 209.

  The client terminal 101 includes client mail receiving means 302, and the client mail receiving means 302 is connected to the internal mail server 104 via the network 103.

  The client mail receiving unit 302 receives an e-mail from the client terminal 101 existing in the internal system or a client terminal existing in an external system other than the internal system via the internal mail server 104.

  The received mail is displayed on the display device 210 including items such as the address 501, CC 502, subject 503, e-mail text 504, and attached file 505 of the mail creation screen 500 shown in FIG. Check the contents of the received e-mail.

  The internal mail server 104 includes server mail receiving means 303, and the server mail receiving means 303 is connected to at least one or more external mail servers 106 via the client terminal 101 or the wide area network 105.

  The server mail receiving unit 303 receives an e-mail from the client terminal 101 existing in the internal system or a client terminal existing in an external system other than the internal system.

  The internal mail server 104 includes a password setting determination unit 304, a password storage unit 305, a mail generation unit 306, a server mail transmission unit 307, a password notification mail generation unit 308, and a password notification mail transmission unit 309.

  The password setting determination unit 304 is connected to the server mail reception unit 303, the password storage unit 305, the mail generation unit 306, and the password notification mail generation unit 308.

  When the server mail receiving unit 303 receives the notification that the e-mail has been received, the password setting determination unit 304 analyzes the content of the e-mail, but the analysis content is summarized as an e-mail with an attached file. If there is, the e-mail destination (CC may be included) is extracted, and a predetermined password corresponding to this e-mail is specified, or a password is automatically generated at random.

  In other words, for a destination set as a destination, if a password is used for an attached file using a predetermined password, a predetermined password for setting the attached file is used. If the password is specified and the operation using the predetermined password is not performed, the password is automatically and randomly generated every time an e-mail is sent.

  Passwords to be set according to such destinations are stored in advance in a table constituting the password storage unit 305, and an example of the configuration of this table is a password table 800 shown in FIG.

  The password table 800 transmits an e-mail address 801 indicating a destination to be a target for setting a predetermined password in an attached file, an attached file password 802 indicating a predetermined password, and an e-mail notifying only the password set in the attached file. It has a configuration including a use date and time 803 that indicates the date when the date is set.

  The password setting determination unit 304 determines whether or not a predetermined password corresponding to the extracted destination exists in the password storage unit 305 (password table 800). If it does not exist, the password is automatically generated at random.

  Or, even if it exists, you can use an automatically generated password every time you send an e-mail to each other. In this case, the attached file password 802 of the password table 800 may be set with information for automatically generating a password randomly.

  The password setting determination unit 304 notifies the mail generation unit 306 of the password and the analysis end result when the password corresponding to the extracted destination exists in the password storage unit 305 after analyzing the email. If not, the mail generation means 306 is notified of the analysis end result.

  In addition, when a predetermined password corresponding to the extracted destination exists in the password storage unit 305, the password notification mail generation unit 308 is notified of the extracted destination, the password, and the like together with the analysis end result. Not only the item but also the item can be notified as long as the contents (to be described later) to be notified to the transmission destination can be specified from the e-mail.

  The mail generation unit 306 is also connected to the server mail transmission unit 307. When the password setting determination unit 304 receives a notification of the password and the analysis end result, the mail generation unit 306 receives the attached file of the email received by the server mail reception unit 303. Is extracted, the notified password is set for the attached file, the attached file with the password set is attached to the e-mail again, and output to the server mail transmitting means 307.

  When the password setting determination unit 304 receives only the notification of the analysis end result, the e-mail received by the server mail receiving unit 303 is output to the server mail transmitting unit 307.

  The server mail transmission unit 307 is connected to at least one or more external mail servers 106 via the client terminal 101 or the wide area network 105.

  When the server mail transmission unit 307 receives the output of the e-mail from the mail generation unit 306, the server mail transmission unit 307 transmits the e-mail to the client terminal 101 existing in the internal system or the client terminal existing in the external system other than the internal system. Do.

  The password notification mail generation unit 308 is connected to the password notification mail transmission unit 309, and when the notification of the extracted destination, password, etc. is received from the password setting determination unit 304 together with the analysis end result, the password notification mail generation unit 308 is set in the attached file. Generate an e-mail to notify only the new password.

  As an example of an email notifying only the password set in the attached file, there is a password notification screen 600 shown in FIG. 6. The password notification screen 600 includes a destination 601 indicating a destination address of the email, CC (Carbon Copy). 602, a subject 603 indicating the title of the e-mail, and an e-mail body 604.

  In the addresses 601 and CC 602, the addresses (address 501 of the mail creation screen 500) and CC (CC 502 of the mail creation screen 500) notified from the password setting determination unit 304 are set in the description order in the description order. The contents indicating that this e-mail is an e-mail notifying only the password set in the attached file (for example, password notification) is set.

  The e-mail body 604 outputs the name corresponding to the destination and the password notified from the password setting determination unit 304. However, as described above, the information notified from the password setting determination unit 304 includes information that can be extracted from the e-mail received by the server mail receiving unit 303, for example, an attached file such as a title set in the subject 503. It is also possible to output information that makes it easy to specify the e-mail to be sent.

  When the generation of the e-mail for notifying only the password set in the attached file is completed, the password notification mail generation unit 308 notifies the password notification mail transmission unit 309 of the completion of generation.

  The password notification mail transmission unit 309 is connected to at least one or more external mail servers 106 via the client terminal 101 or the wide area network 105.

  Upon receiving the generation completion notification from the password notification mail generation unit 308, the password notification mail transmission unit 309 sets the attached file to the client terminal 101 existing in the internal system or a client terminal existing in the external system other than the internal system. Send an e-mail notifying only the entered password.

  The administrator client terminal 102 includes password setting means 310, which is connected to the internal mail server 104 and displays a screen (not shown) for setting a password according to the destination. The information is displayed on the apparatus 210 and the administrator is made to input.

  The password input by the password setting unit 310 is transmitted to the internal mail server 104 via the network 103 and stored in the password storage unit 305 (password table 800).

  That is, a screen (not shown) for setting a password according to the destination in the password setting unit 310 can input each item (at least the items of the email address 801 and the attached file password 802) in the password table 800. It has. However, when the record is initially registered or when the record is changed, the use date 803 is set as a blank.

  Next, FIG. 4 shows a flowchart representing a password notification mail transmission process in the information processing system according to the embodiment of the present invention. In addition, about the process performed by each step, a process is performed under control of CPU201 of the internal mail server 104. FIG.

  In step S101, the server mail receiving unit 303 receives the e-mail transmitted by the client mail transmitting unit 301 of the client terminal 101. In step S102, the password setting determining unit 304 is attached to the e-mail received in step S101. Determine whether the file exists.

  If it is determined that the attached file exists, the process proceeds to step S103, and if it is not determined that the attached file exists, the process proceeds to step S117.

  In step S103, the password setting determination unit 304 acquires information about the destination from the e-mail. In step S104, the password setting determination unit 304 corresponds to the mail address 801 of the password table 800 corresponding to the destination acquired in step S103. The attached file password 802 is acquired, and the password corresponding to the destination is specified. If the email address 801 corresponding to the destination does not exist in the password table 800, it is specified that there is no password corresponding to the destination.

  In step S105, the password setting determination unit 304 determines whether or not the password specified in step S104 is a predetermined password. If it is determined that the password is a predetermined password, the process proceeds to step S106, and the predetermined password is determined. If not, the process proceeds to step S118.

  As this determination method, only a predetermined password is set in the attached file password 802, and for a destination that does not exist in the password table 800, a password is automatically generated at random. If the password 802 includes a predetermined password corresponding to the destination, the process proceeds to step S106, and if not, the process proceeds to step S118.

  As another determination method, when setting a predetermined password or information for automatically generating a password randomly in the attached file password 802, in this step, the information set in the attached file password 802 is If it is a predetermined password, the process proceeds to step S106, and if it is information indicating that a password is automatically generated at random, the process proceeds to step S118. In the case of this other determination method, although not shown in the flowchart, if there is no destination in the password table 800, the process proceeds to step S117.

  In step S106, the mail generation unit 306 extracts the attachment file of the email received in step S101, and in step S107, the mail generation unit 306 identifies the attachment file extracted in step S106 in step S104. Set a password.

  In step S108, the mail generation unit 306 attaches the attached file for which the password is set in step S107 to the electronic mail again.

  In step S109, the password notification mail generation unit 308 determines whether or not to notify the destination of an e-mail that notifies only the password set in the attached file for the first time. If it is not determined to notify for the first time, the process proceeds to step S113.

  In this step, every time an e-mail is sent, a predetermined password is notified once (first time) without sending a predetermined password notification mail, and thereafter, the transmission of the notification mail is stopped. Is possible.

  As a result, there are effects such as password leakage, oversight of e-mail accompanying increase in the number of received e-mails, and reduction of communication load.

  This determination can be made by referring to the use date and time 803 of the password table 800. If the use date and time 803 is set as a blank, only the password set in the attached file is used for the first time. It is determined that the e-mail to be notified is notified, and the process proceeds to step S110. If the date and time is set in the use date and time 803, the process proceeds to step S113.

  The determination in this step is based on whether or not notification is made for the first time. However, the determination is made based on whether or not the user has notified the password used when exchanging e-mails with each other a predetermined number of times. May be.

  In this case, the use count item may be added to the password table 800, and the count may be incremented each time the password is used. For example, the increment is performed after the process of step S112 is performed.

  In step S110, the password notification mail generation unit 308 uses the destination acquired in step S103 and the password specified in step S104 to output an e-mail notifying only the password set in the attached file to which a predetermined password is output. Generate. As described above, one example of this e-mail has the configuration shown in FIG.

  In step S111, the server mail transmission unit 307 transmits the e-mail generated in step S108 to the destination (including CC), and then in step S112, the server mail transmission unit 307 generates the e-mail in step S110. An e-mail notifying only the password set in the attached file is transmitted to the destination (including CC). In this step, the date of transmission is stored in the use date 803.

  In step S113, the password notification mail generation unit 308 determines whether or not a predetermined period has elapsed since the previous use of the predetermined password. If it is determined that the predetermined period has elapsed, the process proceeds to step S114, If it is not determined that the period has elapsed, the process proceeds to step S117.

  In step S114, the password notification mail generation unit 308 uses the destination acquired in step S103 and the password specified in step S104 to output an e-mail notifying only the password set in the attached file to which a predetermined password is output. Generate. As described above, one example of this e-mail has the configuration shown in FIG. In this step, the fact that a predetermined period has elapsed may be additionally output to this configuration to prevent user confusion.

  In step S115, the server mail transmission unit 307 transmits the e-mail generated in step S108 to the destination (including the CC), and then in step S116, the server mail transmission unit 307 generates the e-mail in step S114. An e-mail notifying only the password set in the attached file is transmitted to the destination (including CC). In this step, the date of transmission is stored in the use date 803.

  In step S117, the server mail transmission unit 307 transmits the electronic mail acquired in step S101 to the destination (including CC).

  In step S118, the password notification mail generation unit 308 generates a random password such as a one-time password. In step S119, the mail generation unit 306 extracts the attached file of the email received in step S101, and in step S120. Then, the mail generation unit 306 sets the password generated in step S118 for the attached file extracted in step S119.

  In step S121, the mail generation unit 306 attaches the attached file in which the password is set in step S107 to the electronic mail again.

  In step S122, the password notification mail generation unit 308 uses the destination acquired in step S103 and the password generated in step S118 to output an e-mail notifying only the password set in the attached file to which the generated password is output. Generate. As described above, one example of this e-mail has the configuration shown in FIG.

  In step S123, the server mail transmission unit 307 transmits the e-mail generated in step S121 to the destination (including the CC). After that, in step S124, the server mail transmission unit 307 generates the e-mail in step S122. An e-mail notifying only the password set in the attached file is transmitted to the destination (including CC).

  In the first embodiment of the present invention, the password is applied only to the destination, but the password may be applied to the mail address included in the CC. In this case, in step S103, the password setting determination unit 304 acquires the mail address set in the destination and CC from the electronic mail.

  In step S104, the password setting determination unit 304 acquires the attached file password 802 corresponding to the mail address in the password table 800 corresponding to the destination acquired in step S103 or the mail address set in the CC, and The password corresponding to the mail address set in the destination or CC is specified.

  If there is no e-mail address 801 corresponding to the e-mail address set in the destination or CC in the password table 800, it is specified that there is no password corresponding to the e-mail address set in the destination or CC.

  The processing after step S105 is performed as many times as the number of mail addresses set in the destination or CC.

  That is, a password corresponding to the mail address set in the destination or CC is set for the attached file, and the attached file in which the password is set is attached to the e-mail.

  At this time, an e-mail with an attached file with a password set is generated for the number of e-mail addresses set in the destination or CC.

  Furthermore, an email is generated that notifies only the password set in the attached file in accordance with the password corresponding to the mail address set in the destination or CC by the number of mail addresses set in the destination or CC. To each destination or mail address set in the CC.

  When taking such an aspect, basically, when there is no destination in the password table 800 or the mail address 801 corresponding to the mail address set in the CC, the destination determined as not existing after step S118. Alternatively, a random password is generated for each e-mail address set in the CC, and an e-mail notifying only the password set in the attached file is generated and set in the destination or the CC. Send to the specified email address.

  Similarly, when there are a plurality of destinations, it is needless to say that the processing is performed as many as the number of mail addresses set as the destinations. The same applies when there are a plurality of mail addresses set in the CC.

[Second Embodiment]

  Next, the second embodiment will be described. Since the configuration and processing are substantially the same as those of the first embodiment, the same configuration and processing will be described below using the same reference numerals.

  In the first embodiment, the password to be used is applied according to the destination address of the e-mail. However, in the second embodiment, the e-mail source and destination e-mail addresses are used. And apply the password to be used.

  The first embodiment is different from the first embodiment in that items of e-mail address_1901 and e-mail address_2902 are added to the configuration of the password table 800 shown in FIG. 8 as shown in FIG. Address_2902 is the same item as the mail address 801. That is, the item of the mail address_1901 is added to the password table 800 shown in FIG.

  In the password notification mail transmission process shown in FIG. 4 using the password table 900, in step S103, the password setting determination unit 304 determines the address and the mail address of the transmission source when acquiring the address from the e-mail. get.

  In step S104, the password setting determination unit 304 acquires the attached file password 802 corresponding to the mail address_1901 and the mail address_2902 of the password table 900 corresponding to the combination of the destination and the transmission source acquired in step S103. The password corresponding to the destination is specified. If there is no email address_1901 and email address_2902 corresponding to the combination of the destination and the transmission source in the password table 900, it is specified that there is no password corresponding to the combination of the destination and the transmission source.

  In the processing after step S107, processing is performed using the password corresponding to the combination of the destination and the transmission source specified in step S104.

  As described above, according to the present invention, after an e-mail is transmitted, a predetermined password is notified by a destination e-mail address, so that e-mail transmission / reception can be performed flexibly while improving security. Can be planned.

  Further, the present invention can take an embodiment as a method, a program, a storage medium, or the like.

  In this case, the program itself read from the recording medium realizes the novel function of the present invention, and the recording medium storing the program constitutes the present invention. As a recording medium for supplying the program, for example, a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, DVD-ROM, magnetic tape, nonvolatile memory card, ROM, EEPROM, silicon A disk or the like can be used.

  Further, by executing the program read by the computer, not only the functions of the above-described embodiments are realized, but also an OS or the like operating on the computer based on an instruction of the program is a part of the actual processing or It goes without saying that the case where the functions of the above-described embodiments are realized by performing all of the above processing is also included.

  Furthermore, after the program read from the recording medium is written to the memory provided in the function expansion board inserted into the computer or the function expansion unit connected to the computer, the function expansion board is based on the instructions of the program code. It goes without saying that the case where the CPU or the like provided in the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

  Needless to say, the present invention can be applied to a case where the present invention is achieved by supplying a program to a system or apparatus. In this case, by reading a recording medium storing a program for achieving the present invention into the system or apparatus, the system or apparatus can enjoy the effects of the present invention.

  Furthermore, by downloading and reading a program for achieving the present invention from a server, database, etc. on a network using a communication program, the system or apparatus can enjoy the effects of the present invention. In addition, all the structures which combined each embodiment mentioned above and its modification are also included in this invention.

100 Information Processing System 101 Client Terminal 102 Administrator Client Terminal 103 Local Area Network (LAN)
104 internal mail server 105 wide area network 106 external mail server 201 CPU
202 RAM
203 ROM
204 System Bus 205 Input Controller 206 Video Controller 207 Memory Controller 208 Communication I / F (Interface) Controller 209 Input Unit 210 Display Device 211 External Memory

Claims (13)

Storage means for storing a password to be set for the file attached to the e-mail according to the destination of the e-mail;
Server mail receiving means for receiving e-mail;
Password setting determination means for obtaining a password corresponding to the destination of the e-mail received by the server mail receiving means from the password stored in the storage means;
Mail generating means for setting the password acquired by the password setting determining means for the attached file;
Server mail transmission means for transmitting the email generated by the mail generation means to the destination;
Password notification email generating means for generating an email for password notification indicating the password acquired by the password setting determining means;
A password notification e-mail transmission unit that transmits an e-mail for password notification generated by the password notification e-mail generation unit to the destination after the e-mail is transmitted by the server mail transmission unit;
A management means for managing a time related to transmission of an email for password notification by the password notification mail sending means using a password corresponding to the destination;
With
The password notification e-mail transmission means does not transmit the password notification e-mail until a predetermined period has elapsed from the time when the password notification e-mail is transmitted by the password notification e-mail transmission means managed by the management means, On the other hand, after elapse of a predetermined period, a password notification email showing the same password as the password shown in the transmitted password notification email generated by the password notification email generation means is sent. An information processing apparatus characterized by the above. When the password corresponding to the destination of the e-mail can be acquired from the storage unit by the password setting determination unit, the mail generation unit sets the password as a predetermined password for the attached file, When the password corresponding to the destination of the e-mail cannot be acquired from the storage unit by the password setting determination unit, the mail generation unit automatically generates a password at random and sets it for the attached file;
The password notification e-mail transmission means is for password notification until a predetermined period elapses from the time when the password notification e-mail indicating the predetermined password is transmitted by the password notification e-mail transmission means managed by the management means. On the other hand, after the elapse of a predetermined period, an e-mail is not sent, and a predetermined password identical to the predetermined password shown in the transmitted password notification e-mail generated by the password notification e-mail generation means is indicated. Send a password notification email,
On the other hand, the password notification mail generation unit generates a password notification email indicating the random password every time an email is transmitted by the server mail transmission unit. Information processing device. The password stored in the storage means stores a predetermined password or information indicating that a password is automatically generated at random every time an e-mail is transmitted,
When the predetermined password is obtained from the storage unit by the password setting determination unit, the mail generation unit sets the predetermined password for the attached file, while the password setting determination unit sets the storage unit to the storage unit. The mail generation means automatically generates a password at random and sets it for the attached file when acquiring information indicating that the password is automatically generated at random from 2. The information processing apparatus according to 2. The time managed by the management means is stored every time the password notification e-mail is transmitted,
The password notification e-mail transmission means transmits the password notification e-mail related to the predetermined password to the destination generated by the password notification e-mail generation means only at the first transmission, and after the first transmission, according the stored time, whenever the previous times elapsed transmission time given for periods, to send e-mail password notification predetermined password and the same predetermined password indicated in the transmitted e-mail password notification is shown The information processing apparatus according to claim 2, wherein: The storage means stores a password to be set for a file attached to an e-mail corresponding to a combination of e-mail transmission source and destination e-mail addresses,
5. The password setting determination unit acquires a password corresponding to a combination of an e-mail destination and a transmission source of the e-mail received by the server mail receiving unit from a password stored in the storage unit. The information processing apparatus according to any one of the above.   When a plurality of e-mail destinations received by the server mail receiving unit are acquired by the password setting determining unit, the mail generating unit attaches each password acquired by the password setting determining unit to the number of destinations. The information processing apparatus according to claim 1, wherein the information processing apparatus is set for the processed file.   When a plurality of e-mail destinations received by the server mail receiving unit are acquired by the password setting determination unit, the password notification e-mail generation unit indicates the password acquired by the password setting determination unit by the number of destinations. The information processing apparatus according to any one of claims 1 to 6, further comprising password notification mail generation means for generating an email for each password notification.   8. The management unit according to claim 1, further comprising: storing and managing in a table a time when the password notification email transmission unit transmits a password notification e-mail using a password corresponding to the destination. The information processing apparatus according to any one of claims. An information processing system in which a plurality of client terminals that transmit and receive e-mail and an information processing apparatus are connected via a network,
The client terminal is
Client mail transmission means for transmitting the e-mail;
Client mail receiving means for receiving the e-mail from server mail transmitting means;
A client notification email receiving means for receiving an email for password notification sent by the password notification email sending means;
With
The information processing apparatus includes:
Storage means for storing a password to be set in the file attached to the e-mail according to the destination of the e-mail;
Server mail receiving means for receiving e-mail from the client mail sending means;
Password setting determination means for obtaining a password corresponding to the destination of the e-mail received by the server mail receiving means from the password stored in the storage means;
Mail generating means for setting the password acquired by the password setting determining means for the attached file;
Server mail transmitting means for transmitting the email generated by the mail generating means to the client terminal identified from the destination;
Password notification email generating means for generating an email for password notification indicating the password acquired by the password setting determining means;
A password notification e-mail transmission unit that transmits an e-mail for password notification generated by the password notification e-mail generation unit to the destination after the e-mail is transmitted by the server mail transmission unit;
A management means for managing a time related to transmission of an email for password notification by the password notification mail sending means using a password corresponding to the destination;
With
The password notification e-mail transmission means does not transmit the password notification e-mail until a predetermined period has elapsed from the time when the password notification e-mail is transmitted by the password notification e-mail transmission means managed by the management means, On the other hand, after elapse of a predetermined period, a password notification email showing the same password as the password shown in the transmitted password notification email generated by the password notification email generation means is sent. An information processing system characterized by A method for controlling an information processing apparatus that performs transmission / reception processing of electronic mail,
Server mail receiving step for receiving e-mail,
Password setting for acquiring a password for setting a password corresponding to the destination of the email received in the server mail receiving step in a file attached to the email from a password stored in a storage unit that stores the password according to the destination of the email Judgment step,
A mail generation step for setting the password acquired in the password setting determination step for the attached file;
A server mail sending step for sending the email generated by the mail generating step to the destination;
A password notification e-mail generation step for generating a password notification e-mail indicating the password acquired by the password setting determination step;
A password notification email sending step for sending an email for password notification generated by the password notification email generation step to the destination after sending an email by the server email sending step;
A management step of managing a time related to transmission of an email for password notification by the password notification email transmission step using a password corresponding to the destination;
Including
The password notification email sending step does not send the password notification email until a predetermined period has elapsed from the time the password notification email sending step managed by the management step sends the password notification email. On the other hand, after elapse of a predetermined period, a password notification email indicating the same password as the password shown in the transmitted password notification email generated by the password notification email generation step is transmitted. A method for controlling an information processing apparatus, comprising: A program that can be read and executed by an information processing apparatus that performs transmission / reception processing of electronic mail,
Server mail receiving means for receiving e-mail;
Password setting for acquiring a password for setting a password corresponding to the destination of the e-mail received by the server mail receiving unit in a file attached to the e-mail from a password stored in a storage unit that stores the password according to the destination of the e-mail A determination means;
Mail generating means for setting the password acquired by the password setting determining means for the attached file;
Server mail transmission means for transmitting the email generated by the mail generation means to the destination;
Password notification email generating means for generating an email for password notification indicating the password acquired by the password setting determining means;
A password notification e-mail transmission unit that transmits an e-mail for password notification generated by the password notification e-mail generation unit to the destination after the e-mail is transmitted by the server mail transmission unit;
A management means for managing a time related to transmission of an email for password notification by the password notification mail sending means using a password corresponding to the destination;
To function,
The password notification e-mail transmission means does not transmit the password notification e-mail until a predetermined period has elapsed from the time when the password notification e-mail is transmitted by the password notification e-mail transmission means managed by the management means, On the other hand, after elapse of a predetermined period, a password notification email indicating the same password as the password shown in the transmitted password notification email generated by the password notification email generation means is transmitted. A program characterized by functioning. A method of controlling an information processing system in which a plurality of client terminals that perform transmission and reception of electronic mail and an information processing apparatus are connected via a network,
The client terminal is
A client mail sending step for sending the e-mail;
A client mail receiving step for receiving the email sent by the server mail sending step;
A client notification email receiving step for receiving an email for password notification sent by the password notification email sending step;
Including
The information processing apparatus includes:
A server mail receiving step for receiving the email sent by the client mail sending step;
The password acquired from the password stored in the storage means for storing the password corresponding to the destination of the email received by the server mail receiving step in the file attached to the email according to the destination of the email Setting judgment step,
A mail generation step for setting the password acquired in the password setting determination step for the attached file;
A server mail transmission step of transmitting the email generated by the mail generation step to the client terminal identified from the destination;
A password notification e-mail generation step for generating a password notification e-mail indicating the password acquired by the password setting determination step;
A password notification email sending step for sending an email for password notification generated by the password notification email generation step to the destination after sending an email by the server email sending step;
A management step of managing a time related to transmission of an email for password notification by the password notification email transmission step using a password corresponding to the destination;
Including
The password notification email sending step does not send the password notification email until a predetermined period has elapsed from the time the password notification email sending step managed by the management step sends the password notification email. On the other hand, after elapse of a predetermined period, a password notification email indicating the same password as the password shown in the transmitted password notification email generated by the password notification email generation step is transmitted. A method for controlling an information processing system comprising: In an information processing system in which a plurality of client terminals that transmit and receive e-mail and an information processing apparatus are connected via a network,
The client terminal is
Client mail transmission means for transmitting the e-mail;
Client mail receiving means for receiving the e-mail from server mail transmitting means;
A client notification email receiving means for receiving an email for password notification sent by the password notification email sending means;
To function,
The information processing apparatus;
Server mail receiving means for receiving e-mail from the client mail sending means;
The password acquired from the password stored in the storage means for storing the password corresponding to the destination of the email received by the server mail receiving means in the file attached to the email according to the destination of the email Setting determination means;
Mail generating means for setting the password acquired by the password setting determining means for the attached file;
Server mail transmitting means for transmitting the email generated by the mail generating means to the client terminal identified from the destination;
Password notification email generating means for generating an email for password notification indicating the password acquired by the password setting determining means;
A password notification e-mail transmission unit that transmits an e-mail for password notification generated by the password notification e-mail generation unit to the destination after the e-mail is transmitted by the server mail transmission unit;
A management means for managing a time related to transmission of an email for password notification by the password notification mail sending means using a password corresponding to the destination;
To function,
The password notification e-mail transmission means does not transmit the password notification e-mail until a predetermined period has elapsed from the time when the password notification e-mail is transmitted by the password notification e-mail transmission means managed by the management means, On the other hand, after elapse of a predetermined period, a password notification email indicating the same password as the password shown in the transmitted password notification email generated by the password notification email generation means is transmitted. A program characterized by functioning.

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