一个适用于车载自组织网络的安全高效的聚合签名方案

An Efficient and Secure Aggregate Signature Scheme for Vehicular Ad Hoc Network

车载自组织网络是智能交通系统的基础,是实现车联网的关键技术.聚合签名技术可以在大大节省传输带宽和计算资源的前提下为多个用户提供消息认证,所以很适合用于车载自组织网中进行消息聚合和批量签名验证.首先给出了基于身份的聚合签名方案的定义和敌手模型,接着构造了一个高效的基于身份的聚合签名方案,该方案具有固定长度和固定双线性对运算量,在Computational Diffie-Hellman困难假设下证明了该方案是存在性不可伪造的.最后分析比较了方案的执行效率,指出它能以更低的计算与通信成本为车辆节点发送的信息提供安全认证.

Vehicular ad hoc network（VANET）is the foundation of future intelligent transportation and the keytechnology to realize car networking. Aggregate signature can provide message authentication for multiple users under thepremise of greatly saving the transmission bandwidth and computing resources. So,it is suitable for message aggregationand batch signature verification in VANET. This paper proposes the definition and security model for ID-basedaggregate signature（IBAS）scheme,and then presents an efficient IBAS scheme with constant length and pairingcomputations. The scheme is existentially unforgeable under the computational Diffie-Hellman assumption. Lastly,theauthor analyzes the IBAS scheme＇s efficiencies and pointes out that it is able to provide message authentication forvehicle nodes with lower computation cost and communication overhead.