The basic idea behind the vehicular ad-hoc network (VANET) is the exchange of traffic information between vehicles and the surrounding environment to offer a better driving experience. Privacy and security are the main concerns for meeting the safety aims of the VANET system. In this paper, we analyse recent VANET schemes that utilise a group authentication technique and found important vulnerabilities in terms of driving safety. These systems also suffer from vulnerabilities in terms of management efficiency and computational complexity. To defeat these problems, we propose a lightweight scheme, SD2PA, based on a general hash function for VANET. The proposed scheme overcomes the non-safe driving problem that resulted from the critical driving area. Moreover, the vehicle authentication is only done once by the VANET system administrator during the vehicle’s moving, so the authentication redundancy for the entire system is reduced and system management efficiency is enhanced. The SD2PA scheme also provides anonymity to protect the vehicle’s privacy, unless an important action needs to be taken against a malicious vehicle. A deep computational cost and communicational overhead analysis indicates that SD2PA is better than related schemes, as well as efficiently meeting VANET’s security and privacy needs.

中文翻译：

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SD2PA：针对VANET的完全安全的驾驶和隐私保护认证方案

车辆自组织网络（VANET）的基本思想是在车辆与周围环境之间交换交通信息，以提供更好的驾驶体验。隐私和安全性是满足VANET系统安全目标的主要考虑因素。在本文中，我们分析了利用组认证技术的最新VANET方案，并发现了在驾驶安全方面的重要漏洞。这些系统在管理效率和计算复杂性方面也存在漏洞。为了克服这些问题，我们基于VANET的通用哈希函数，提出了一种轻量级方案SD2PA。所提出的方案克服了由于关键驾驶区域引起的非安全驾驶问题。此外，车辆行驶过程中，VANET系统管理员仅对车辆进行一次身份验证，因此减少了整个系统的身份验证冗余，并提高了系统管理效率。SD2PA方案还提供匿名性，以保护车辆的隐私，除非需要对恶意车辆采取重要措施。深入的计算成本和通信开销分析表明，SD2PA比相关方案更好，并且可以有效满足VANET的安全性和隐私需求。