车载网网络规模巨大、无线信道开放以及移动轨迹可预见等特点，使其更容易遭受安全威胁。针对该问题，设计了一个基于属性密码的车载网安全通信认证方案。方案采用移动通信的群组管理模式，以属性签密和属性群签名为基础，实现了不同种类的车辆在不泄露隐私的前提下以属性的不同获取不同的服务，并且可以在群中进行属性类别的批量认证。性能和安全分析表明，方案在达到安全需求的同时，实践性强，效率较高而且更加符合现实场景。%VANET(Vehicular Ad hoc Network) is prone to attack of safety and leakage of privacy, because of the large scale of networks, openness of the wireless communication channel and easy tracking of mobile vehicles. Moti-vated by the security requirements, an attribute-based authenticated protocol for secure communication of VANET was proposed, in which attribute-based signcryption and signature were used to help vehicles to securely receive a secret key and message from an RSU or other vehicles, and then the vehicles could anonymously receive different service with different attributes on behalf of the group, moreover attributes scheme was employed to accelerate the verification. The results showed that the scheme achieves confidentiality and authentication, at the same time, the maneuverability and efficiency of the communication and authentication are raised, and which is more suitable for the practical applica-tions.
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