1 需求背景有许多通信网络越来越需要数据安全,或者是出于保密的考虑,例如军用网中的数据保护;或者是由于相互认证的需要,例如在商业业务网中,尤其需要相互认证;或者两者兼有,既需要数据保密,又需要通信双方的相互认证。在这类点对点通信网中,为满足安全性最常用的方法是加密技术。加密技术的有效 1 Background of Requirements There are many communications networks that are increasingly requiring data security either for security reasons, such as data protection in military networks, or because of the need for mutual authentication, such as in commercial services networks, in particular, mutual authentication, Or both, both the need for data security, but also the mutual authentication of both communication parties. In this type of peer-to-peer communications network, the most common method of meeting security is encryption. Encryption technology is effective