Software College, Northeastern University, Shenyang 110819, China.
Sensors (Basel). 2023 Apr 18;23(8):4066. doi: 10.3390/s23084066.
Vehicle ad hoc networks (VANETs) are special wireless networks which help vehicles to obtain continuous and stable communication. Pseudonym revocation, as a vital security mechanism, is able to protect legal vehicles in VANETs. However, existing pseudonym-revocation schemes suffer from the issues of low certificate revocation list (CRL) generation and update efficiency, along with high CRL storage and transmission costs. In order to solve the above issues, this paper proposes an improved Morton-filter-based pseudonym-revocation scheme for VANETs (IMF-PR). IMF-PR establishes a new distributed CRL management mechanism to maintain a low CRL distribution transmission delay. In addition, IMF-PR improves the Morton filter to optimize the CRL management mechanism so as to improve CRL generation and update efficiency and reduce the CRL storage overhead. Moreover, CRLs in IMF-PR store illegal vehicle information based on an improved Morton filter data structure to improve the compress ratio and the query efficiency. Performance analysis and simulation experiments showed that IMF-PR can effectively reduce storage by increasing the compression gain and reducing transmission delay. In addition, IMF-PR can also greatly improve the lookup and update throughput on CRLs.
车辆自组网(VANETs)是一种特殊的无线网络，可帮助车辆实现连续稳定的通信。假名撤销作为一种重要的安全机制，能够保护 VANETs 中的合法车辆。然而，现有的假名撤销方案存在证书撤销列表(CRL)生成和更新效率低、CRL 存储和传输成本高的问题。为了解决上述问题，本文提出了一种用于 VANETs 的改进的基于 Morton 过滤器的假名撤销方案(IMF-PR)。IMF-PR 建立了一种新的分布式 CRL 管理机制，以保持低 CRL 分发传输延迟。此外，IMF-PR 改进了 Morton 过滤器，以优化 CRL 管理机制，从而提高 CRL 的生成和更新效率，并降低 CRL 的存储开销。此外，IMF-PR 基于改进的 Morton 过滤器数据结构存储 CRL 中的非法车辆信息，以提高压缩比和查询效率。性能分析和仿真实验表明，IMF-PR 可以通过增加压缩增益和减少传输延迟来有效减少存储。此外，IMF-PR 还可以大大提高 CRL 的查找和更新吞吐量。
