基于椭圆曲线加密的Ad hoc网络密钥交换方案

Key Exchange Scheme Based on ECC in Ad Hoc Networks

A d hoc网络由于其自身的特点,具有抗攻击能力差,终端节点资源有限,计算能力差等弱点.目前已经提出的密钥交换协议都是以有限域离散对数为基础建立起来的,运算量大,需要中心节点验证,不能完全符合A d hoc网络的特点.椭圆曲线加密体制加密强度大,速度快,占用的处理单元和带宽较小.提出了一种在A d hoc网络的节点之间用椭圆曲线加密进行密钥交换的方案,并扩展到一组A d hoc网络节点中,既保证了网络中节点间的通信安全,又具有很强的实用性.

There are some disadvantages in Ad hoc networks such as the weak capability of attacking-resistance, limitation of source and the bad capability of computation. Now, most of key agreement protocols are based on Diffie-Hellman protocol, which is not fit for Ad Hoc networks. The elliptic curve cryptosystem has features of safeness, high speed in encryption and taking smaller space. A new scheme that can establish key agreement based on elliptic curve cryptosystem has been put forward. The scheme can insure the communication security and the feasibility. In conclusion the good practicability of the scheme is proved.