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电子邮件由于快捷、方便已逐步取代纸质邮件成为人们进行交流通讯的工具。但是在一些涉密的应用中,如政府、商业等重要部门还需具备加密/解密、完整性鉴别、身份认证以及抗否认等功能。其中最主要也是实现比较困难的是抗否认的实现,即;一方面,如何对抗发送方对已经发送邮件的否认;另一方面,如何对抗接收方对已经接收邮件的否认。在这个问题上已经有许多实现的协议,本文将在分析以前实现协议的基础上,提出一种安全的电子邮件保证协议,该协议可以很好地实现抗否认问题,而且易于在已有的网络设施上实现。
E-mail has gradually replaced paper mail as a tool for people to communicate because of their speed and convenience. However, some classified applications, such as government, commerce and other important departments need to have encryption / decryption, integrity authentication, authentication and anti-denial functions. One of the most important and more difficult to achieve is the realization of anti-denial, that is, on the one hand, how to counter the sender’s denial of sent mail; on the other hand, how to counter the receiver’s denial of received mail. There are already many agreements on this issue. Based on the analysis of previous agreements, this paper proposes a secure e-mail guarantee protocol that can well resist the denial problem and is easy to implement in existing networks Facilities to achieve.