JP2011124947A5

JP2011124947A5 -

Info

Publication number: JP2011124947A5
Application number: JP2009283323A
Authority: JP
Filing date: 2009-12-14
Publication date: 2011-08-18
Anticipated expiration: 2029-12-14

Claims

An e-mail control device that is communicable with an e-mail transmission terminal and determines a risk value related to transmission of an e-mail transmitted by the e-mail transmission terminal,
Risk storage means for storing link risk information indicating a risk value indicating a degree of risk relating to transmission of an email transmitted in the past with respect to a set of the email transmission source and the email transmission destination;
A risk value related to sending of the e-mail corresponding to a combination of a sender risk value indicating the degree of risk relating to the e-mail sender and a risk type indicating the degree of risk relating to the e-mail is specified. Initial risk information storage means for storing initial risk information for
Acquisition means for acquiring an e-mail sent by previous SL email sending terminal,
When the set of the e-mail transmission source and the e-mail transmission destination acquired by the acquisition unit is stored in the link risk information stored in the risk storage unit, it is stored corresponding to the set Determining means for determining a risk value related to transmission of the e-mail acquired by the acquiring means according to the risk value,
In accordance with the risk value of the email sent in the past from the sender of the email acquired by the acquisition means, included in the link risk information stored in the risk storage means, the risk of the email sender Calculating means for calculating a source risk value indicating the degree;
A determination unit that determines a risk type indicating a degree of risk associated with the e-mail according to the content of the e-mail acquired by the acquisition unit or the format of data attached to the e-mail;
With
The determination unit is configured to perform the initial processing when the set of the transmission source of the email acquired by the acquisition unit and the transmission destination of the email is not stored in the link risk information stored in the risk storage unit. In accordance with the initial risk information stored in the risk information storage means, a risk value corresponding to the source risk value calculated by the calculation means and the risk type determined by the determination means is acquired by the acquisition means. electronic mail control apparatus characterized by that determine as a risk value according to the sending of e-mail.

Link risk of whether there is e-mail sent from the acquired e-mail sender other it is not the transmission source in the past to the destination of the e-mail by the acquisition unit, stored in the Risk storage means Link determination means for determining according to the information;
Wherein the link determination unit, when it is determined from the acquired e-mail sender other not in the source that there is e-mail sent in the past to the destination of the e-mail by the acquisition unit, the electronic for a set of the source and the e-mail destination of the mail, in accordance with the risk value stored in the risk storage means, corresponding to the combination of the risk classification and the source risk value by the initial risk information Changing means for changing a specific criterion of a risk value related to sending of the e-mail ;
The electronic mail control apparatus according to claim 1, further comprising:

In the link determination unit, when it is determined that there is no e-mail sent to the destination of the e-mail from the acquired e-mail sender other it is not the transmission source by the acquisition unit, by the acquisition unit determining from the acquired e-mail sender other it is not the transmission source, whether or not there is an e-mail that is sent to the destination domain of the e-mail, according to the link risk information stored in the risk memory means A domain determining means for
The changing means is the calculating means according to a risk value stored in the risk storage means for a set of a transmission source and a transmission destination of an email determined to be transmitted to the domain by the domain determination means. The e-mail control apparatus according to claim 2, wherein the sender risk value calculated in step 1 is changed.

Condition storage means for storing a risk condition indicating a condition for determining whether to permit transmission of the e-mail based on the risk value determined by the determination means;
By determining whether the risk value determined by the determination unit satisfies the risk condition stored in the condition storage unit, it is determined whether transmission of the email acquired by the acquisition unit is permitted, and Transmission control means for performing transmission control of the electronic mail according to the determination result;
The electronic mail control apparatus according to claim 1, further comprising:

Stores link risk information indicating a risk value indicating a degree of risk related to transmission of an e-mail transmitted in the past for a set of the e-mail transmission source and the e-mail transmission destination, which is communicable with an e-mail transmission terminal. To send the e-mail corresponding to a combination of a risk storage means, a sender risk value indicating a degree of risk relating to the sender of the e-mail, and a risk type indicating a risk degree relating to the e-mail. An initial risk information storage means for storing initial risk information for specifying the risk value, and a control method for an e-mail control device comprising:
The acquisition step of the e-mail control device acquires an e-mail transmitted by the e-mail transmission terminal; and
The determining unit of the e-mail control device stores a set of the e-mail transmission source and the e-mail transmission destination acquired in the acquisition step in the link risk information stored in the risk storage unit. In the case, according to the risk value stored corresponding to the set, a determination step of determining a risk value related to sending the email acquired in the acquisition step;
The calculation means of the electronic mail control device is included in the link risk information stored in the risk storage means, according to the risk value of the electronic mail transmitted in the past from the transmission source of the electronic mail acquired in the acquisition step, A calculation step of calculating a sender risk value indicating a degree of risk relating to the sender of the email;
The determination unit of the electronic mail control device determines a risk type indicating the degree of risk associated with the electronic mail according to the content of the electronic mail acquired in the acquiring step or the format of the data attached to the electronic mail. A determination process;
With
In the determination step, when the set of the transmission source of the email acquired in the acquisition step and the transmission destination of the email is not stored in the link risk information stored in the risk storage unit, the initial step According to the initial risk information stored in the risk information storage means, the risk value corresponding to the transmission source risk value calculated in the calculation step and the risk type determined in the determination step is acquired in the acquisition step. method of controlling an electronic mail control apparatus characterized by that determine as a risk value according to the sending of e-mail.

Stores link risk information indicating a risk value indicating a degree of risk related to transmission of an e-mail transmitted in the past for a set of the e-mail transmission source and the e-mail transmission destination, which is communicable with an e-mail transmission terminal. To send the e-mail corresponding to a combination of a risk storage means, a sender risk value indicating a degree of risk relating to the sender of the e-mail, and a risk type indicating a risk degree relating to the e-mail. An initial risk information storage means for storing initial risk information for specifying the risk value, and a program executable by an e-mail control device comprising:
The e-mail control device;
Acquisition means for acquiring an e-mail sent by previous SL email sending terminal,
When the set of the e-mail transmission source and the e-mail transmission destination acquired by the acquisition unit is stored in the link risk information stored in the risk storage unit, it is stored corresponding to the set Determining means for determining a risk value related to transmission of the e-mail acquired by the acquiring means according to the risk value,
In accordance with the risk value of the email sent in the past from the sender of the email acquired by the acquisition means, included in the link risk information stored in the risk storage means, the risk of the email sender Calculating means for calculating a source risk value indicating the degree;
According to the content of the email acquired by the acquisition unit or the format of the data attached to the email, function as a determination unit that determines a risk type indicating the degree of risk related to the email,
The determination unit is configured to perform the initial processing when the set of the transmission source of the email acquired by the acquisition unit and the transmission destination of the email is not stored in the link risk information stored in the risk storage unit. In accordance with the initial risk information stored in the risk information storage means, a risk value corresponding to the source risk value calculated by the calculation means and the risk type determined by the determination means is acquired by the acquisition means. program characterized that you determined as a risk value according to the sending of e-mail.