适用于车载网的匿名异构聚合签密方案

异构聚合签密既能够实现不同密码系统之间信息传输的机密性和不可伪造性,也能够降低通信开销。结合车载网的特点,提出了一个无证书密码系统到基于身份密码系统的异构聚合签密方案,并采用不同的系统参数来增强系统的安全性。方案能够同时为多个消息进行验证,并为发送者实现了身份匿名,有效解决了用户的隐私安全问题。同时,在随机预言模型下证明了该方案满足不可区分性和不可伪造性。数据对比实验表明,该方案相对于同类型方案有效地降低了通信开销,适合用于车载网络。

An anonymous heterogeneous aggregatesigncryption scheme for vehicular networks

Heterogeneous aggregate signcryption can not only achieve the confidentiality and unforgeability of information transmission between different cryptosystems, but also reduce the cost of data communication. Combining with the characteristics of vehicular networks, we present a heterogeneous aggregate signcryption scheme from certificateless cryptography to identity based cryptography, and adopt different system parameters to enhance the security of the system. The scheme can simultaneously verify multiple messages and keep the sender's identity anonymous, which can effectively secure the privacy of users. Moreover, we prove the indiscernibility and unforgeability of the scheme under the random oracle model. Data comparison experiments show that compared with the schemes of the same type, the proposed scheme is effective in reducing communication cost and more suitable for vehicular networks.