基于协作模式的匿名消息认证协议

Anonymous Authentication Protocol Based on a Cooperative Mode Vehicular Networks

消息认证是提高车联网(Vehicular Ad Hoc Networks,VANETs)服务的可靠性的有效手段。然而,现存的匿名消息认证协议存在通信、认证、撤销成本高的问题。为此,提出基于协作模式的匿名消息认证(Anonymous Authentication protocol based on a cooperative mode,AA-CM)协议。AA-CM协议利用带密钥散列链(Keyed Hash Chain,KHC)产生双别名,并通过密钥哈希链和双别名机制降低撤销列表(Revocation List,RL)成本尺寸。同时,AA-CM协议引用协作认证模式,避免非协作认证和协作认证模式间的认证同步问题。性能分析表明,提出的AA-CM协议降低成本,并具有条件隐私保护能力。

To provide reliable Vehicular ad hoc networks(VANETs)services,message authentication is an important feature.Unfortunately,previously proposed anonymous message authentication protocols had serious practical shortcomings,including high communication,authentication,and revocation costs.Therefore,Anonymous Authentication protocol based on a cooperative mode(AA-CM)is proposed in this paper.We design a two-layered pseudonym generation method based on a keyed hash chain.The keyed hash chain and two-layer pseudonym generation method can reduce the size of the RL.In addition,we propose a basic cooperative authentication method that does not require authentication mode synchronization between non-cooperative and cooperative authentication.The performance analysis results show that its performance of AA-CM protocol is improved in reducing the cost,and the AA-CM protocol poss conditional privacy preservation.