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本文通过研究用来传递电子邮件的SMTP协议的会话过程和基本原理,引入Libnids网络开发包作为工具,捕获局域网的数据包并进行协议还原和协议分析,从而为邮件内容还原打下基础,以实现系统安全性的提升。
This paper studies the process and basic principle of the SMTP protocol used to deliver e-mail, introduces the Libnids network development kit as a tool to capture LAN packets and protocol recovery and protocol analysis, so as to lay the foundation for the restoration of e-mail content to achieve system Security improvement.