The pervasive communications between vehicles and dynamic mobility may significantly increase data exchange and therefore bring a huge amount of traffic data in InVANETs. Due to some environmental factors, like the vulnerability of wireless connection, limitation of in-car computing ability, and speed of vehicles, it is extremely challenging to design identity authentication protocols satisfying the requirements of both high security and efficiency simultaneously. To this end, the aggregate signature technology has been employed in InVANETs. However, the technology still suffers from high computational overhead due to the management of certificates, as well as the key escrow problem (i.e., the dependence on a fully trusted third party). In this article, we propose the SE-CLASA protocol for InVANETs in order to tackle the aforementioned problems. In addition, a novel factor-contained aggregation mechanism is proposed to resist an information injection attack investigated in our analysis. Moreover, we prove the security of the proposed SE-CLASA and conclude that it meets most known security requirements in a general InVANET scenario. Simulation results show the superiority of the proposed SE-CLASA, in terms of security and efficiency, compared to the most recent authentications in InVANETs.

中文翻译：

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用于InVANET的增强安全性的无证书聚合签名身份验证协议

车辆之间的普遍通信和动态机动性可能会大大增加数据交换，因此会在InVANET中带来大量交通数据。由于一些环境因素，例如无线连接的脆弱性，车内计算能力的限制以及车辆的速度，设计同时满足高安全性和高效率要求的身份认证协议极具挑战性。为此，聚合签名技术已在InVANET中使用。然而，由于证书的管理以及密钥托管问题（即，对完全受信任的第三方的依赖），该技术仍然遭受高计算开销。在本文中，我们提出了针对InVANET的SE-CLASA协议，以解决上述问题。另外，我们提出了一种新颖的包含因子的聚集机制来抵抗信息注入攻击。此外，我们证明了建议的SE-CLASA的安全性，并得出结论，它满足一般InVANET方案中最已知的安全要求。仿真结果表明，与InVANET中最新的身份验证相比，拟议的SE-CLASA在安全性和效率方面具有优势。