An Improved Provable Secure Certificateless Aggregation Signature Scheme for Vehicular Ad Hoc NETworks

Vehicular Ad hoc NETworks (VANETs) which is an important part of smart cities are large networks that organize wireless communication and information exchange between vehicles and X (X: cars, roads, pedestrians, and the Internet). The security and efficiency of the message authentication algorithm are crucial to the VANETs. After analyzing the security shortage of Wang Daxing et al VANETs message authentication scheme, an improved provable secure certificateless aggregation signature scheme for VANETs is proposed. The scheme constructs a secure certificateless aggregation authentication scheme by using Elliptic Curve Cryptography (ECC) and reduces the complexity of the cryptographic operation process, while achieving user’s conditional privacy protection. Rigid security analysis proves that the scheme satisfies the security requirements of VANETs. The performance analysis shows the proposed scheme considerably reduces the computational cost of message signature, single verification and aggregation verification algorithm, and reduces the communication cost when compared with Wang schemes.