JP2019185093A - Mail monitoring apparatus and method - Google Patents

Abstract

To transmit an authorized mail whose content is confirmed by a third person without revealing confidential information included in the mail to be transmitted.SOLUTION: An authorization request unit 17 is provided for acquiring a concealment target keyword from a concealment management DB 14C in response to an authorization request instruction related to a mail to be transmitted, and after replacing the concealment target keyword included in the mail to be transmitted with a concealment character set in advance and concealing it, requesting authorization to an approver. A mail monitoring unit 16 receives the mail to be transmitted from a user terminal 20, temporary stores the mail to be transmitted in a mail management DB 14D, instructs an authorization request of the mail to be transmitted to an authorization request unit 17, if the approval is obtained by the approver, acquires the mail to be transmitted from the mail management DB 14D and transmits it to a communication network NW, and if the approval is not obtained by the approver, stops transmitting of the mail to be transmitted to the communication network NW.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mail monitoring technique for transmitting a mail after obtaining a third party's approval for the contents of the mail when transmitting the electronic mail.

The e-mail monitoring device accepts e-mails sent from user terminals connected under its control, notifies the third party once to check the e-mail content, and if approval is obtained from the third party, A device that officially sends mail to a communication network. Hereinafter, the electronic mail may be simply referred to as mail.
Conventionally, as such a mail monitoring device, words to be monitored are registered in advance, a registered word is searched from a mail to be transmitted, and the third is based on the sum of weights assigned to the found registered words. There has been proposed a method for determining whether or not the content confirmation by the person is necessary (see, for example, Patent Document 1).

JP 2003-67307 A

  However, in such a conventional technology, when the content confirmation by a third party is necessary, the email to be sent is notified to the third party as it is, so the technical information of the company, customer information, secret There is a problem that confidential information such as information or personal information of employees and users is disclosed to a third party, and there is a risk of information leakage or misuse.

  The present invention is intended to solve such problems, and can monitor an email that has been approved by a third party approver without revealing confidential information contained in the email to be sent. The purpose is to provide technology.

  In order to achieve such an object, the mail monitoring apparatus according to the present invention receives a mail to be transmitted from a user terminal, and requests an approval for a content of the mail to be transmitted from a preset approver. A mail monitoring apparatus for transmitting the transmission target mail to a communication network when approval is obtained, a concealment management database for storing a concealment target keyword for specifying a concealment target phrase to be concealed, and the transmission target A concealment target keyword is acquired from the concealment management database in response to an approval request instruction regarding mail, the concealment target phrase included in the transmission target mail is specified based on the concealment target keyword, and a concealment set in advance is specified. After concealing by replacing with characters, an approval request unit for requesting approval from the approver, and the transmission pair from the user terminal Accept the mail, temporarily store the email to be sent, and instruct the approval request unit for an approval request for the email to be sent, and when the approval is obtained by the approver, A mail monitoring unit that transmits the transmission target mail to the communication network and stops transmission of the transmission target mail to the communication network if the approval is not obtained by the approver;

  Also, in one configuration example of the mail monitoring apparatus according to the present invention, the concealment management database includes transmission source information regarding a transmission source of the transmission target mail, transmission destination information regarding a transmission destination of the transmission target mail, or the transmission source. An individual concealment target keyword is stored in advance for each combination of information and the destination information, and the approval request unit transmits the transmission extracted from the transmission target mail when acquiring the concealment target keyword from the concealment management database. A concealment target keyword corresponding to original information, transmission destination information, or a combination of transmission source information and transmission destination information is acquired.

  In addition, one configuration example of the mail monitoring apparatus according to the present invention further includes an approval management database that stores an approval target keyword for each user mail address that is a transmission source of the transmission target mail, and the mail monitoring unit includes: , Obtaining an approval target keyword corresponding to the source email address extracted from the transmission target mail from the approval management database, and if the approval target keyword is included in the transmission target mail, the transmission target mail is In addition to temporarily storing and instructing the approval request unit to approve the transmission target mail, if the approval target keyword is not included in the transmission target mail, the transmission target mail is directly transmitted to the communication network. It is what you do.

  In addition, the mail monitoring method according to the present invention accepts a transmission target mail from a user terminal, requests approval for the contents of the transmission target mail from a preset approver, and obtains approval. A mail monitoring method used in a mail monitoring device for transmitting the transmission target mail to a communication network, wherein the concealment management database stores a concealment target keyword for identifying a concealment target phrase to be concealed, and an approval request In response to an approval request instruction regarding the transmission target email, obtain a concealment target keyword from the concealment management database, identify the concealment target phrase included in the transmission target email based on the concealment target keyword, An approval request step for requesting approval from the approver after concealing with a concealment character set in advance. And the mail monitoring unit accepts the transmission target mail from the user terminal, temporarily stores the transmission target mail, instructs the approval request unit to approve the transmission target mail, and the approver When the approval is obtained, the stored transmission target mail is transmitted to the communication network. When the approval is not obtained by the approver, the transmission target mail is transmitted to the communication network. And a mail monitoring step for canceling.

  According to the present invention, when a third party approver is requested to confirm the content of the email to be sent, the approval request is sent to the approver after the confidential information contained in the email to be sent is concealed. Therefore, the content confirmation by the approver is performed in a state where the confidential information is kept secret. For this reason, it is possible to transmit an approved mail whose contents have been confirmed by a third party without revealing confidential information included in the mail to be transmitted. Therefore, it is possible to avoid the risk at the time of approval of the transmission target mail, the risk of leakage of confidential information, and the abuse, and it is possible to monitor the content of the transmission target mail extremely safely.

It is a block diagram which shows the structure of a mail monitoring apparatus. It is a structural example of user management DB. It is a structural example of approval management DB. It is a structural example of concealment management DB. It is a structural example of mail management DB. It is a flowchart which shows a mail monitoring process (approval necessity determination process). It is a flowchart which shows an approval request process. It is a flowchart which shows a mail monitoring process (approval result determination process). It is an example of creation of an approval request mail.

Next, an embodiment of the present invention will be described with reference to the drawings.
[Mail monitoring device]
First, a mail monitoring apparatus 10 according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of the mail monitoring apparatus.

The mail monitoring device 10 is connected between the communication network NW and the communication line L2, and has a function of monitoring outgoing mail from a plurality of user terminals 20.
As a specific example of the mail monitoring device 10, a network device such as a mail server, a UTM (Unified Threat Management), a gateway, a router, a switch, or a hub may be configured by a dedicated information processing device such as a server device or a personal computer. Further, it may be realized by using a telephone control device of a telephone system or a PBX system.

The user terminal 20 is composed of an information processing terminal such as a personal computer, a smartphone, or a tablet as a whole. When the user transmits mail to the communication network NW, the user terminal 20 passes through the mail monitoring device 10 connected via the communication line L2. And has a function of sending mail.
The approver terminal 30 is composed of an information processing terminal such as a personal computer, a smartphone, and a tablet as a whole, and receives an approval request mail notified from the mail monitoring apparatus 10 via the communication line L2 in response to an approver operation. It has a function of displaying a screen and returning an approval result mail to the mail monitoring apparatus 10.

  In the following, the case where the mail monitoring apparatus 10 is used in a company office environment will be described as an example. However, the present invention is not limited to this and can be used in other environments such as a general home. Moreover, although the case where the approver (for example, a user's superior) exists in the company and the approver terminal 30 is connected to the mail monitoring apparatus 10 via the communication line L2, it demonstrates as an example, However, it is limited to this The approver may exist outside the company. In this case, an approval request mail and an approval result mail, which will be described later, are exchanged with the approver terminal 30 via the communication network NW.

  As shown in FIG. 1, the mail monitoring apparatus 10 includes, as main functional units, a network I / F unit 11, a terminal I / F unit 12, a storage unit 13, a user management DB 14A, an approval management DB 14B, a concealment management DB 14C, A mail management DB 14D, a mail transmission / reception unit 15, a mail monitoring unit 16, and an approval request unit 17 are provided. Among these functional units, the mail transmission / reception unit 15, the mail monitoring unit 16, and the approval request unit 17 are realized by the cooperation of the CPU and the program.

The network I / F unit 11 has a function of transmitting and receiving electronic mail by performing data communication with the communication network NW via the communication line L1.
The terminal I / F unit 12 has a function of performing notification of an email to be transmitted to the approver and exchanging approval results by performing data communication with the user terminal 20 and the approver terminal 30 via the communication line L2. Have.
The storage unit 13 includes a storage device such as a semiconductor memory or a hard disk, and has a function of storing a program used for mail monitoring processing and various data.

  The user management DB 14A is a database in which user information related to a user who is a transmission source or a transmission destination of a transmission target mail is registered in advance. FIG. 2 is a configuration example of the user management DB. Here, in the user management DB 14A, for each user mail address, a user ID and user affiliation are registered as a set as a user.

  Among the user information, the user ID is identification information for identifying the user. For example, the identification information such as an employee code used in the company or an extension number used in the telephone system is used. Also good. The user affiliation information is information indicating the department to which the user belongs in the company. For the user management DB 14A, a contact management database such as an existing employee database, business card management database, or telephone directory database may be used.

  In FIG. 2, user information whose user ID is “1001” and whose sender affiliation is “Department A” is registered in the user mail address “aaa@saxa.jp”. In the user mail address “bbb@saxa.jp”, user information whose user ID is “1002” and whose sender affiliation is “department B” is registered. In addition, user information whose sender affiliation is “company X” is registered in the user mail address “xxx@xx.jp”. Note that the user ID does not have to be registered for an outside user who is a transmission destination. User affiliation information may be registered by combining a company name with a department.

  The approval management DB 14 </ b> B is a database in which approval information used for determination of necessity of approval for a transmission target email notified from the user terminal 20 and an approval request to the approver is registered in advance. FIG. 3 is a configuration example of the approval management DB. Here, in the approval management DB 14B, an approval target keyword and an approver email address are registered as a set as approval information for each user email address.

  In the approval information, the approval target keyword is a keyword for determining whether or not the transmission target mail is required for approval, and the approver mail address is the mail address of the approver who is addressed to the transmission of the approval request mail.

  In FIG. 3, approval information whose approval target keyword is “customer information” and whose approver e-mail address is “ssa@saxa.jp” is registered in the user e-mail address “aaa@saxa.jp”. . As a result, when the sender email address of the email to be sent is “aaa@saxa.jp” and the email to be sent contains the word “customer information” (in this case, the email subject), that is, It is determined that approval is required for the email to be sent with the email subject “customer information” sent by the user of the sender email address “aaa@saxa.jp”, and “ssa” is the approver email address of the approver at that time. @ Saxa.jp "is designated.

  Further, in FIG. 3, in the user mail “bbb@saxa.jp”, the approval target keyword is “xxx@xx.co.jp” and the approver mail address is “ssb@saxa.jp”. Information is registered. Thereby, the transmission source mail address of the transmission target mail is “bbb@saxa.jp”, and the phrase “xxx@xxx.co.jp” (in this case, the address of company X) is included in the transmission target mail. If it is included, that is, the transmission target email addressed to the company X having the destination email address “xxx@xx.co.jp” sent by the user of the source email address “bbb@saxa.jp” is approved. Is determined, and “ssb@saxa.jp” is designated as the approver mail address of the approver at that time.

  The concealment management DB 14 </ b> C is a database in which concealment target keywords for specifying concealment target phrases to be concealed from the contents of the transmission target mail included in the approval request mail are registered in advance. FIG. 4 is a configuration example of the concealment management DB. Here, in the concealment management DB 14C, a concealment target keyword is registered for each of transmission source information regarding the transmission source of the transmission target mail, transmission destination information regarding the transmission destination of the transmission target mail, or a combination of transmission source information and transmission destination information. Yes. As shown in FIG. 4, the concealment target keyword may be an item name in which the concealment target phrase is described, or may be a search character such as a wild card indicating the concealment target phrase itself.

  In FIG. 4, the transmission source information and the transmission destination information are both “common”, that is, the concealment target keyword “phone number, address,...” Is registered in common for all combinations of the transmission source and the transmission destination. Further, the concealment target keyword “customer ID, customer name,...” Is registered for the combination in which the transmission source information is “Department A” and the transmission destination information is “common”. Further, the concealment target keyword “development theme name, project name,...” Is registered for the combination of the transmission source information “Department B” and the transmission destination information “Company X”. Further, the concealment target keyword “my number, date of birth,...” Is registered for the combination in which the transmission source information (sender ID) is “1001” and the transmission destination information is “common”.

The email management DB 14D is a database for temporarily storing emails to be transmitted that have been determined to require approval. FIG. 5 is a configuration example of the mail management DB. Here, in the mail management DB 14D, the mail data of the transmission target mail is registered for each storage ID for identifying the transmission target mail.
These user management DB 14A, approval management DB 14B, concealment management DB 14C, and mail management DB 14D are composed of storage devices such as a hard disk and a semiconductor memory, and may be realized by individual storage devices, or a common storage device or storage unit. 13 may be implemented by the same storage device. Further, it may be realized by a storage device externally connected to the mail monitoring device 10.

  The mail transmission / reception unit 15 has a function of transmitting / receiving mails to / from the communication network NW via the network I / F unit 11 and the communication line L1, and a user terminal 20 via the terminal I / F unit 12 and the communication line L2. And a function for transmitting and receiving mail to and from the approver terminal 30.

  The mail monitoring unit 16 accepts the transmission target mail from the user terminal 20 received by the mail transmission / reception unit 15, temporarily stores the transmission target mail in the mail management DB 14 </ b> D, and sends an approval request for the transmission target mail to the approval request unit 17. When it is confirmed that the approval of the approver is obtained from the approval result mail received from the approver terminal 30 received by the mail transmitting / receiving unit 15, the mail to be transmitted is acquired from the mail management DB 14D. A function of transmitting to the communication network NW, and a function of canceling transmission of the transmission target mail to the communication network NW when the approval of the approver is not obtained.

  More specifically, the mail monitoring unit 16 acquires the approval target keyword related to the transmission source mail address extracted from the transmission target mail from the approval management DB 14B, and searches for the transmission target mail, and the approval target keyword is the transmission target. When included in the mail, the transmission target mail is temporarily stored in the mail management DB 14D, and the function for instructing the approval request unit 17 to approve the transmission target mail and the approval target keyword are included in the transmission target mail. If not, it has a function of transmitting the transmission target mail as it is to the communication network NW.

  The approval request unit 17 acquires a concealment target keyword from the concealment management DB 14C in response to an approval request instruction regarding the transmission target mail from the mail monitoring unit 16, and sets a concealment target keyword included in the transmission target mail in advance. It has a function of requesting an approver for approval after concealing by concealing with a concealing character.

[Operation of this embodiment]
Next, the operation of the mail monitoring apparatus 10 according to the present embodiment will be described.
[Email monitoring process (approval necessity determination process)]
First, with reference to FIG. 6, the approval necessity determination process of the mail monitoring process by the mail monitoring unit 16 will be described. FIG. 6 is a flowchart showing mail monitoring processing (approval necessity determination processing).
When the mail transmission / reception unit 15 receives a mail to be transmitted from the user terminal 20, the mail monitoring unit 16 executes the mail monitoring process (approval necessity determination process) in FIG.

First, the mail monitoring unit 16 acquires a transmission target mail from the mail transmission / reception unit 15 (step S100), extracts a transmission source mail address from the transmission target mail (step S101), and transmits the transmission source mail address from the user management DB 14A. User information of the transmission source user corresponding to is acquired (step S102).
Subsequently, the mail monitoring unit 16 acquires the approval information corresponding to the transmission source mail address from the approval management DB 14B (step S103), and searches for the approval target keyword included in the approval information from the transmission target mail (step S103). S104).

  Here, when the approval target keyword is not included in the transmission target mail (step S105: NO), the mail monitoring unit 16 determines that the approval of the approver for the transmission target mail is unnecessary, and the transmission target mail is mailed. Without storing in the management DB 14D, the mail transmission / reception unit 15 is instructed to transmit the mail to be transmitted (step S106), and the series of mail monitoring processes is terminated. As a result, the mail to be transmitted is transmitted from the mail transmitting / receiving unit 15 to the communication network NW via the network I / F unit 11 and the communication line L1.

  On the other hand, in step S105, when the approval target keyword is included in the transmission target mail (step S105: YES), the mail monitoring unit 16 determines that the approval of the approver for the transmission target mail is necessary, and the transmission target After the storage ID is assigned to the mail and stored in the mail management DB 14D (step S107), the approval request unit 17 is instructed to approve the transmission target mail (step S108), and the series of mail monitoring processes is terminated.

[Approval request processing]
Next, the approval request process by the approval request unit 17 will be described with reference to FIG. FIG. 7 is a flowchart showing the approval request process.
In response to the approval request instruction from the mail monitoring unit 16, the approval request unit 17 executes the approval request process of FIG.

  First, the approval request unit 17 acquires a transmission target mail from the mail management DB 14D based on the storage ID notified by the approval request instruction from the mail monitoring unit 16 (step S110), and transmits the transmission source mail from the transmission target mail. The address and the destination mail address are extracted (step S111), and the sender information that is the user information regarding the sender user is acquired from the user management DB 14A based on the sender mail address, and based on the sender mail address. Then, transmission destination information, which is user information related to the transmission destination user, is acquired from the user management DB 14A (step S112).

  Next, the approval request unit 17 acquires the approval information regarding the transmission source user from the approval management DB 14B based on the transmission source email address (step S113), and the approval request email template registered in the storage unit 13 in advance. An approval request mail is created based on the transmission target mail (step S114). At this time, the approval request unit 17 adds the storage ID and the transmission target mail to the body field of the approval request mail, sets the transmission source mail address of the transmission target mail in the transmission source mail address of the approval request mail, Set the approver email address included in the approval information in the email address of the approval request email.

  Thereafter, the approval request unit 17 acquires a concealment target keyword related to the transmission source information and the transmission destination information from the concealment management DB 14C (step S115), After concealing by replacing with a concealment character set in advance, for example, “*” (step S116), the mail transmitting / receiving unit 15 is instructed to transmit an approval request mail (step S117), and a series of approval request processing is performed. finish. Thereby, the approval request mail is transmitted from the mail transmitting / receiving unit 15 to the approver terminal 30 of the approver via the terminal I / F unit 12 and the communication line L2.

[Email monitoring process (approval result judgment process)]
Next, with reference to FIG. 8, the approval result determination process of the mail monitoring process by the mail monitoring unit 16 will be described. FIG. 8 is a flowchart showing mail monitoring processing (approval result determination processing).
When the mail transmission / reception unit 15 receives an approval result mail from the approver terminal 30, the mail monitoring unit 16 executes the mail monitoring process (approval result determination process) in FIG.

First, the mail monitoring unit 16 acquires an approval result mail from the mail transmitting / receiving unit 15 (step S120), and confirms the approval result regarding the transmission target mail (step S121).
Here, when the approval of the approver is obtained (step S121: YES), the mail monitoring unit 16 acquires the mail to be transmitted from the mail management DB 14D based on the storage ID included in the approval result mail ( In step S122, the mail transmission / reception unit 15 is instructed to transmit a transmission target mail (step S123). As a result, the mail to be transmitted is transmitted from the mail transmitting / receiving unit 15 to the communication network NW via the network I / F unit 11 and the communication line L1.

  Further, the mail monitoring unit 16 indicates that the approval for the transmission target mail has been obtained based on the monitoring result mail template registered in advance in the storage unit 13 (approval), and further indicates the monitoring result mail indicating completion of mail transmission. Is created (step S124), and the transmission / reception unit 15 is instructed to transmit the monitoring result mail to the transmission source user of the transmission target mail (step S125). Thereby, the approval request mail is transmitted from the mail transmitting / receiving unit 15 to the transmission source user of the transmission target mail via the terminal I / F unit 12 and the communication line L2.

  On the other hand, if the approver's approval is not obtained in step S121 (step S121: NO), the mail monitoring unit 16 transmits based on the monitoring result mail template registered in the storage unit 13 in advance. Create a monitoring result mail indicating that the target mail has not been approved (denied), and further indicate a mail transmission failure (step S126), and send / receive the monitoring result mail to the transmission source user of the transmission target mail. The unit 15 is instructed (step S125). Thereby, the approval request mail is transmitted from the mail transmitting / receiving unit 15 to the transmission source user of the transmission target mail via the terminal I / F unit 12 and the communication line L2.

  Thereafter, the mail monitoring unit 16 deletes the transmission target mail temporarily stored in the mail management DB 14D based on the storage ID (step S125), and ends the series of mail monitoring processing (approval result determination processing).

[Operation example]
Next, an example of creating an approval request mail will be described with reference to FIG. FIG. 9 shows an example of creating an approval request mail.
First, it is assumed that the approval target keyword “customer information” is registered in the approval management DB 14B for the transmission source mail address “aaa@saxa.jp” extracted from the transmission target mail MA. Here, since the approval target keyword “customer information” is included in the subject name of the MA, the MA is determined to require approval by the approver, and an approval request mail MB with the MA added to the text is generated. The At this time, the subject of M clearly indicates that the mail is “transmission approval request”, and the text requesting mail approval and the storage ID “001” of MA are described in the mail body.

At this time, since the approver mail address “ssa@saxa.jp” related to the sender mail address “aaa@saxa.jp” is registered in the approval management DB 14B, this “ssa@saxa.jp” is the MB. Set as the destination mail address.
In addition, as user information related to the MA transmission source mail address “aaa@saxa.jp”, a user ID “1001” and user affiliation information “Department A” are registered in the user management DB 14A. Note that user information related to the MA's sender mail address “yyy@yy.co.jp” is not registered.

  In the concealment management DB 14C, concealment keywords “customer ID”, “phone number”, and “my number” are registered in association with the user information. Therefore, among the MAs included in the MB, information “12-45-24-12” regarding “customer ID”, information “03-aaa-bbbb” regarding “phone number”, and information “xxx yyyy” regarding “my number”. Each character constituting “zzzz” is replaced with a concealment character “*” to be concealed.

[Effects of the present embodiment]
As described above, according to the present embodiment, the concealment target keyword is acquired from the concealment management DB 14C in response to the approval request instruction regarding the transmission target mail, and the concealment target keyword included in the transmission target mail is set as the concealment character set in advance. After being replaced by and concealed, an approval request unit 17 for requesting approval from the approver is provided, and the mail monitoring unit 16 accepts the transmission target mail from the user terminal 20, and temporarily transmits the transmission target mail to the mail management DB 14D. In addition to storing, the approval request unit 17 is instructed to approve the transmission target mail, and when approval is obtained by the approver, the transmission target mail is acquired from the mail management DB 14D and transmitted to the communication network NW for approval. The transmission of the email to be sent to the communication network NW is canceled if the approval is not obtained by the operator It is.

  As a result, if the third party approver is requested to confirm the content of the email to be sent, the approver will be asked for approval after the confidential information contained in the email to be sent is concealed. The content is confirmed by the approver in a state where the confidential information is kept secret. For this reason, it is possible to transmit an approved mail whose contents have been confirmed by a third party without revealing confidential information included in the mail to be transmitted. Therefore, it is possible to avoid the risk at the time of approval of the transmission target mail, the risk of leakage of confidential information, and the abuse, and it is possible to monitor the content of the transmission target mail extremely safely.

  Further, in the present embodiment, the concealment management DB 14C has the transmission source information regarding the transmission source of the transmission target mail, the transmission destination information regarding the transmission destination of the transmission target mail, or the combination of the transmission source information and the transmission destination information individually. When the approval request unit 17 acquires the concealment target keyword from the concealment management DB 14C, the transmission source information, the transmission destination information, or the transmission source information and the transmission destination information of the transmission target mail are acquired. A concealment target keyword corresponding to the combination may be acquired.

  As a result, the concealment target keyword can be switched for each transmission source and transmission destination of the transmission target mail, and for each combination of the transmission source and the transmission destination, and it becomes possible to conceal confidential information extremely flexibly and efficiently.

  Further, in the present embodiment, for each user mail address that is a transmission source or a transmission destination of the transmission target mail, an approval management DB 14B in which an approval target keyword is registered in advance is further provided, and the mail monitoring unit 16 includes the transmission target mail. If the approval target keyword related to the transmission source email address extracted from is acquired from the approval management DB 14B, the transmission target mail is searched, and the approval target keyword is included in the transmission target mail, the transmission target mail is stored in the mail management database. The approval request unit 17 is instructed to approve the transmission target mail, and if the approval target keyword is not included in the transmission target mail, the transmission target mail is transmitted to the communication network. Good.

  As a result, it is possible to select only specific emails to be approved for each sender user. Compared to the case where all emails to be approved are subject to approval, the processing burden required for email approval and further The burden on the approver can be greatly reduced, and it becomes possible to monitor emails to be sent extremely flexibly and efficiently.

[Extended embodiment]
The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Mail monitoring apparatus, 11 ... Network I / F part, 12 ... Terminal I / F part, 13 ... Memory | storage part, 14A ... User management DB, 14B ... Approval management DB, 14C ... Concealment management DB, 14D ... Mail management DB, 15 ... mail transmission / reception unit, 16 ... mail monitoring unit, 17 ... approval request unit, 20 ... user terminal, 30 ... approver terminal, L1, L2 ... communication line, NW ... communication network.

Claims (4)

A mail that accepts a mail to be sent from a user terminal, requests approval for the contents of the mail to be sent from a preset approver, and sends the mail to be sent to a communication network when approval is obtained. A monitoring device,
A concealment management database for storing concealment target keywords for identifying concealment target phrases to be concealed;
In response to an approval request instruction related to the transmission target mail, a concealment target keyword is acquired from the concealment management database, and the concealment target word / phrase included in the transmission target mail is specified based on the concealment target keyword and set in advance. An approval request part that requests approval from the approver,
When the transmission target mail is received from the user terminal, the transmission target mail is temporarily stored, the approval request for the transmission target mail is instructed to the approval request unit, and the approval is obtained by the approver Transmits the stored transmission target mail to the communication network, and if the approval is not obtained by the approver, a mail monitoring unit that stops transmission of the transmission target mail to the communication network; A mail monitoring apparatus comprising: The mail monitoring device according to claim 1,
The concealment management database includes transmission source information related to a transmission source of the transmission target mail, transmission destination information regarding a transmission destination of the transmission target mail, or a combination of the transmission source information and the transmission destination information. Pre-store keywords,
When the approval request unit acquires the concealment target keyword from the concealment management database, the concealment target corresponding to the transmission source information extracted from the transmission target mail, transmission destination information, or a combination of transmission source information and transmission destination information A mail monitoring apparatus characterized by acquiring a keyword. The mail monitoring device according to claim 1,
For each user email address that is the sender of the email to be sent, further comprising an approval management database for storing the keyword to be approved,
The mail monitoring unit acquires an approval target keyword corresponding to a transmission source email address extracted from the transmission target mail from the approval management database, and when the approval target keyword is included in the transmission target mail, Temporarily storing the email to be transmitted, instructing the approval request unit to approve the email to be sent, and if the keyword to be approved is not included in the email to be sent, the email to be sent is left as it is A mail monitoring device that transmits to the communication network. A mail that accepts a mail to be sent from a user terminal, requests approval for the contents of the mail to be sent from a preset approver, and sends the mail to be sent to a communication network when approval is obtained. An email monitoring method used in a monitoring device,
A concealment management database storing a concealment target keyword for identifying a concealment target phrase to be concealed;
The approval request unit obtains a concealment target keyword from the concealment management database in response to an approval request instruction regarding the transmission target mail, and specifies the concealment target phrase included in the transmission target mail based on the concealment target keyword. An approval request step for requesting approval from the approver after concealing by replacing with a concealment character set in advance;
The mail monitoring unit accepts the transmission target mail from the user terminal, temporarily stores the transmission target mail, instructs the approval request unit to approve the transmission target mail, and is approved by the approver. If it is obtained, the stored e-mail to be sent is sent to the communication network, and if the approval is not obtained by the approver, the sending of the e-mail to be sent to the communication network is stopped. A mail monitoring method comprising: a mail monitoring step to perform.

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