FBSS：一种基于公平盲签名和秘密共享的车载网隐私保护方案

摘要

Vehicular Ad hoc network (VANET)is a kind of application of mobile Ad hoc network in traffic field,which can greatly improve road safety and traffic efficiency.Authentication and access control in the network is essential to the vehicle and RSU communication,the VANET’s own openness has become very vulnerable in response to information attacks.There-fore,how to ensure the identity privacy and trusted communication is one of the key issues to be resolved.At the same time, preventing the abuse of privacy and privacy attacks should be regarded too.The existing work usually uses the authentication mechanism,and a lot of them focus on the anonymous identity authentication.This paper compared the feature of the existing schemes,and proposed a scheme of anonymous authentication based on fair blind signature and secret sharing.The scheme could achieve the necessary security requirements like other schemes,and could also protect the privacy of vehicles in vehicle authentication and communication.Meanwhile,it could effectively avoid the misuse of anonymous.Through security analysis and experiment,the scheme has higher anonymity and efficiency.%车载自组织网络（VANET）是移动自组织网络在交通领域的一种应用，可极大地提高道路安全和交通效率。网络中认证和访问控制对车辆和RSU通信而言是至关重要的安全服务，VANET自身的开放性导致其在应对信息攻击时显得非常脆弱。因此，如何保证VANET中的身份隐私和可信通信是亟待解决的关键问题之一，与此同时也要防止隐私信息的滥用和隐私攻击。现有的工作通常采用认证机制，大量集中于匿名身份认证。比较了现有方案的特点，提出了一种基于公平盲签名和秘密共享的匿名认证方案（FBSS）。该方案实现了其他方案中必要的安全需求，能够在车辆认证和通信中保护车辆隐私，同时能有效避免匿名滥用的情况。通过安全性分析和实验，该方案具有较高的匿名性和效率。