车载自组织网络的无证书匿名认证协议

Certificateless Anonymous Authentication Protocol for Vehicle Ad-hoc Network

车载自组织网络在解决世界各地日益加重的各种交通问题中,得到了越来越多的应用,其安全性也成为研究的焦点。基于离散对数困难问题,提出了一个无证书的安全V2R匿名认证协议。新协议既避免了基于传统公钥系统的协议需做证书验证和维护的缺陷,又避免了基于身份的认证协议需要密钥分发的缺陷。与具有相同安全级别的匿名认证协议比较,本协议更为安全高效,因此更适用于无线车载网络。

Vehicular Ad-hoc networks （VANET）have acquired more and more applications in dealing the aggravating traffic problems all over world. And their security is receiving increasing attention. Based on discrete logarithm prob-lem, a certificateless secure vehicle-to-roadside anonymous authentication protocol was proposed. The proposed protocol combines the advantages of the protocol based on traditional public key cryptosystem （no key escrow）and that based on ID-PKC（implicit authentication）. Compared with the protocol at the same security level,the efficiency of the proposed approach is much more efficient. So it is more appropriate for VANET.