Packet-level dynamic mail attachment virus detection method

Abstract

The invention discloses a packet-level dynamic mail attachment virus detection method and relates to website security technical field. The method includes that: the received packet is judged if containing attachment information; the encoding mode of the attachment information is checked; the packet is judged if the packet is the end part of the mail; the packet is processed according to the relationship of decoded attachment information length and the preset threshold. The packet-level dynamic mail attachment virus detection method can improve the internal memory utilization rate and the virus detection efficiency.

Description

technical field [0001] The invention relates to the field of email virus detection, in particular to a method for dynamically detecting email attachment viruses at the level of data packets. Background technique [0002] With the development and popularization of the Internet, email plays an increasingly important role in people's work and life, and has become one of the most important network tools in modern interpersonal communication. But at the same time, e-mail viruses are also becoming more and more rampant, which can cause users' computer systems to be paralyzed, or cause user data to be leaked or destroyed. [0003] The Simple Mail Transfer Protocol (SMTP) is an Internet mail transfer protocol widely used at present. But SMTP is a relatively simple protocol based on pure ASCII text, and does not allow characters outside the ASCII character set to be used in mail messages. Therefore, some non-English character set messages and non-text information such as binary fil...

AI Technical Summary

Problems solved by technology

[0008] 1. Occupy a large capacity buffer to store the attachments to be detected, reducing the utilization rate of memory;

[0009] 2. Only after receiving all attachment information can decoding and detection be performed, which increases the delay in detecting viruses and reduces work efficiency;

Images