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首页> 外文期刊>Journal of communications and networks >Flexible, Extensible, and Efficient VANET Authentication
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Flexible, Extensible, and Efficient VANET Authentication

机译：灵活，可扩展和高效的VANET身份验证

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Although much research has been conducted in the area of authentication in wireless networks, vehicular ad-hoc networks (VANETs) pose unique challenges, such as real-time constraints, processing limitations, memory constraints, frequently changing senders, requirements for interoperability with existing standards, extensibility and flexibility for future requirements, etc. No currently proposed technique addresses all of the requirements for message and entity authentication in VANETs.rnAfter analyzing the requirements for viable VANET message authentication, we propose a modified version of TESLA, TESLA++, which provides the same computationally efficient broadcast authentication as TESLA with reduced memory requirements. To address the range of needs within VANETs we propose a new hybrid authentication mechanism, VANET authentication using signatures and TESLA++ (VAST), that combines the advantages of ECDSA signatures and TESLA++. Elliptic curve digital signature algorithm (ECDSA) signatures provide fast authentication and non-repudiation, but are computationally expensive. TESLA++ prevents memory and computation-based denial of service attacks. We analyze the security of our mechanism and simulate VAST in realistic highway conditions under varying network and vehicular traffic scenarios. Simulation results show that VAST outperforms either signatures or TESLA on its own. Even under heavy loads VAST is able to authenticate 100% of the received messages within 107ms.rnVANETs use certificates to achieve entity authentication (I.e., validate senders). To reduce certificate bandwidth usage, we use Hu et al. 's strategy of broadcasting certificates at fixed intervals, independent of the arrival of new entities. We propose a new certificate verification strategy that prevents denial of service attacks while requiring zero additional sender overhead. Our analysis shows that these solutions introduce a small delay, but still allow drivers in a worst case scenario over 3 seconds to respond to a dangerous situation.
机译：尽管已经在无线网络的身份验证领域进行了大量研究，但车载自组织网络（VANET）提出了独特的挑战，例如实时限制，处理限制，内存限制，发送方频繁更改，与现有标准互操作性的要求，扩展性和灵活性，以适应将来的需求等。目前没有提出的技术可以解决VANET中对消息和实体身份验证的所有要求。与TESLA相同的计算有效广播身份验证，减少了内存需求。为了解决VANET中的各种需求，我们提出了一种新的混合身份验证机制，即使用签名和TESLA ++（VAST）的VANET身份验证，该机制结合了ECDSA签名和TESLA ++的优点。椭圆曲线数字签名算法（ECDSA）签名提供快速的身份验证和不可否认性，但计算量大。 TESLA ++可以防止基于内存和基于计算的服务拒绝攻击。我们分析了机制的安全性，并在变化的网络和车辆交通情况下，在现实的公路条件下模拟了VAST。仿真结果表明，VAST本身胜过签名或TESLA。即使是在繁重的负载下，VAST也可以在107毫秒内对100％的收到消息进行身份验证。rnVANET使用证书来实现实体身份验证（即验证发送方）。为了减少证书带宽的使用，我们使用了Hu等。固定间隔广播证书的策略，与新实体的到来无关。我们提出了一种新的证书验证策略，该策略可以防止拒绝服务攻击，同时要求零附加发件人开销。我们的分析表明，这些解决方案引入了较小的延迟，但仍允许驾驶员在最坏的情况下在3秒内响应危险情况。

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