一种安全高效的VANET无证书聚合签名改进方案

A Secure and Efficient VANET Certificateless Aggregate Signature Improvement Scheme

Thumbur等人提出了一种无证书聚合签名方案,以解决VANET中的安全认证和效率问题,并声称该方案是安全的。然而,该方案容易受到签名伪造攻击。为了解决上述安全挑战,提出了一种新的无配对无证书聚合签名方案,并在随机预言模型下证明了其安全性,最后进行了效率分析和比较。安全性分析和效率分析表明,新方案能够以较低的计算成本和通信成本获得更高的安全,且新方案的聚合签名长度是固定的,更适用于资源受限的VANET环境。

Thumbur et al.proposed a certificateless aggregate signature scheme to solve the security authentication and efficiency issues in VANET,and claimed that the scheme is secure.However,this scheme is vulnerable to signature forgery attacks.To solve the above security challenges,a new unmatched certificateless aggregate signature scheme is proposed,and its security is proved under the random oracle model.Finally,the efficiency is analyzed and compared.Security analysis and efficiency analysis indicate that the new scheme can obtain higher security with lower computation and communication costs,and the total signature length of the new scheme is fixed,which is more suitable for resource-constrained VANET environments.