适于车载网安全通信的聚合签密算法

An Aggregate Signcryption Scheme for Secure Communication of Vehicular Ad Hoc Network

聚合签密作为一种可以同时为多个用户提供保密与认证的高效密码技术,能有效解决车载网中用户的隐私安全问题.基于车载网提出了一个高效的基于身份的聚合签密方案,在Computational Bilinear Diffie-Hellman问题和Computational Diffie-Hellman困难假设下证明了方案的机密性和不可伪造性,同时方案满足可公开验证性、不可否认性和前向安全性.最后分析了方案的执行效率,指出该方案能以更低的计算与通信代价实现较高的安全性,很适合用于车载网、物联网等资源受限的无线网络环境.

As an efficient technology providing confidentiality and authentication for many users,aggregatesigncryption can effectively solve the user privacy security issues in vehicular ad hoc network（VANET）. This paperproposes an efficient ID- based aggregate signcryption based on vehicular networks and proves the scheme’sconfidentiality and unforgeability under the Computational Bilinear Diffie-Hellman assumption and ComputationalDiffie-Hellman assumption. And at the same time,the proposed scheme satisfies public verifiability,non-repudiationand forward security. Lastly,the author analyzes the scheme’s efficiency and points out it can achieve high securitywith lower computation cost and communication overhead and is suitable for the resource-constrained wirelessnetworks,such as VANET and Internet of Things.