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电子邮件已经成为互联网上最流行的应用之一,然而与之相关的网络安全问题也接踵而来。为了有效控制和阻止不良信息的传播、机密信息的泄露和垃圾邮件的泛滥,首先需要建立一个系统对电子邮件内容进行还原。首先分析了电子邮件的格式及其实现原理,然后利用Libnids开发包提供的数据包捕获与过滤,TCP数据流重组的功能,设计了一个基于网络数据包的邮件还原系统,以达到对电子邮件进行网络监视的目的。
E-mail has become one of the most popular applications on the Internet, however, and the related network security issues follow. In order to effectively control and prevent the spread of bad information, the disclosure of confidential information and the proliferation of spam, we must first establish a system to restore the contents of e-mail. First, the e-mail format and its implementation principle are analyzed. Then, the function of packet capture and filtering provided by Libnids development kit and TCP data stream reorganization is designed. A e-mail restoring system based on network data packet is designed to achieve e-mail The purpose of network monitoring.