一种新的适于Ad hoc网可认证密钥协商协议

New authenticated key agreement protocol for Ad hoc networks

提出一种新的适于Ad hoc网可认证密钥协商协议。基于签密技术,在同一逻辑步内同时实现了认证和加密功能,提高了密钥协商效率;基于身份的公钥密码系统,降低了建立和管理公钥基础设施的代价;应用椭圆曲线上双线性对,使得该协议能以短的密钥和小的计算量实现同等安全要求。与已有密钥协商协议相比,新协议计算和传输量小,带宽要求低,安全性高,适合能源和带宽受限的Ad hoc网络。

A new authenticated key agreement protocol for Ad hoc networks is proposed. Based on Signcryption technique, this protocol achieves the two functions of authentication and encryption in a single logical step and therefore it has high efficiency. Moreover, using ID-based public key system, the expense of building and managing public key infrastructure is decreased. In addition, the proposed protocol employing bilinear pairing on elliptic curve can reach the equivalent levels of security with key of short length and less computation. Compared with other existent authenticated key agreement protocols, it has a small amount of calculation and transmission, narrow bandwidth requirement, and is high security level. It is very fit for wireless Ad hoc networks.