基于身份的密码体制在即时通信协议中的应用

APPLICATION OF ID-BASED CRYPTOGRAPHIC SCHEME TO INSTANT MESSAGING PROTOCOLS

即时通信系统是一种广泛使用的网络通信手段,但是现有协议多数存在严重安全缺陷。通过将基于身份的密码体制结合到即时通信协议中,并利用一个双方共享的秘密加密保证系统中双方通信的私密性和不可冒充性,新的协议相比已有协议简洁高效,安全性十分明了。

Instant messaging system is a kind of extensively used communication method on Internet, but most existent protocols are short of security properties. This paper applies ID-based cryptographic scheme to instant messaging protocols, and the privacy and un-impersonation of the communications between two parties, encrypted with an exclusively shared secret between them, are satisfied. The new protocol is simple and highly efficient compared to most existent protocols, and its security properties are very clear.