车载网络中支持策略隐藏的属性基加密方案

Attribute base encryption scheme with policy hiding in VANSTs

为能够在车载自组织网络中既达到保护数据的安全性和隐私性的目的,又要具备访问控制的功能,提出一种支持策略隐藏的属性基加密传输方案。使用线性秘密共享矩阵作为访问结构,采用布隆过滤器实现对访问策略的完全隐藏,避免访问策略中的用户属性被公开暴露在车载网络中;使用解密代理将高度复杂的解密计算外包给代理,减少移动车载端的存储和解密开销。通过性能分析和系统实验,验证了该算法具备策略隐藏和车载终端低解密开销的优势。

To protect the security and privacy of data and achieve function of access control in the vehicular ad hoc network,an attribute-based encrypted transmission scheme with policy hiding was proposed.A linear secret sharing matrix was used as the access structure,and for preventing the user attributes in the access policy from being publicly exposed in the vehicle network simultaneously,a Bloom filter was proposed to completely hide the access policy.To reduce storage and decryption overhead on the mobile vehicle,a decryption proxy was used to deal with highly complex decryption computing.Through performance analysis and experiments,the advantages of policy hiding and low decryption overhead of the vehicle terminal are verified in the algorithm.