Anti-disclosure mail safe card and method for detecting disclosure mail

Abstract

An anti-leakage mail security card and its leakage mail detecting method belong to the computer network information security technology. The security card comprises a network host processing module and a data assistant processing module. The network host processing module comprises a main processor, a first Flash memory, a first internal memory, a first serial controller, a first network controller and a second network controller. The data assistant processing module comprises a first assistant processor, a second assistant processor, a second Flash memory, a second internal memory, a second serial controller. The detecting method comprises: recovering and analyzing the text and the accessory of the read mail; judging the mail information security classification; detecting the mail path security; anti-leakage detecting based on the regulation and the algorithm; actively blocking the leakage mail and the suspected leakage mail; manual audit; sending alarm information to the leakage mail and automatically generating evidence. The invention has security, anti-leakage performance, reliability, source authentication and non-repudiation.

Description

technical field [0001] The invention belongs to the field of computer network and information security. Especially network information security. Background technique [0002] At present, the SMTP (Simple Mail Transfer Protocol) protocol is the most popular email transfer protocol, and most of the mail servers and mail gateway products use SMTP as the main mail transfer protocol. However, there are some fatal flaws in the SMTP protocol. For example, SMTP transmits plain text, and the content of the letter body is very easy to be monitored and stolen, resulting in content leakage. Therefore, the ESMTP (Extended SMTP) protocol appeared, which extended the standard SMTP protocol. The difference between it and the SMTP protocol is: when using SMTP to send a letter, there is no need to verify the user account, but when using ESMTP to send a letter, the server will ask the user to provide a user name and password for identity verification. However, the mail sending process after...

AI Technical Summary

Problems solved by technology

Due to the inherent deficiencies of e-mail related protocols, many e-mail security vulnerabilities have been caused, especially the information leakage incidents caused by people with ulterior motives in the system through e-mail have caused serious losses to some military enterprises and institutions and the country

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