ATRC: An anonymous traceable and revocable credential system using blockchain for VANETs
发表信息
作者
- Yang Liu
- Debiao He
- Min Luo
- Huaqun Wang
- Qin Liu
笔记
With the number of smart vehicle drivers increasing rapidly, privacy-preserving identity management methods in Vehicular Ad-hoc Networks (VANETs) become more imperative and receive much attention from researchers. Since identity leakage or a single point of failure may result in serious consequences in the VANET, the decentralized anonymous credential (DAC) could be a potential approach to construct a robust network. However, the supervision under decentrilized environment could be a necessary and troublesome in the VANETs. In this paper, we present an anonymous traceable and revocable credential system using blockchain, called ATRC, built over a generalized group signature. The underlying group signature not only meets the anonymity requirement but also makes the users master their identities. What’s more, to tackle the privacy leakage in the revocation process, we employ the Merkle tree to construct a whitelist, which trades off the efficiency and the privacy. Finally, we gives the comparison and experiment performance to show our scheme holds lightweight on the user side and has fewer computation costs in the show and revocation phase.
随着智能车辆驾驶员数量的迅速增加，车载自组网（VANETs）中隐私保护的身份管理方法变得愈加重要，并受到研究人员的广泛关注。由于身份泄露或单点故障可能导致VANET中严重的后果，去中心化匿名凭证（DAC）可能是构建强健网络的一种潜在方法。然而，在去中心化环境下的监督可能在VANET中是必要且麻烦的。在本文中，我们提出了一种基于区块链的匿名可追踪和可撤销凭证系统，称为ATRC，该系统建立在一种广义群签名之上。基础群签名不仅满足匿名性要求，还使用户能够掌控自己的身份。此外，为了解决撤销过程中隐私泄露的问题，我们采用Merkle树构建了一个白名单，以权衡效率和隐私。最后，我们给出了比较和实验性能的结果，表明我们的方案在用户端保持轻量级，并且在展示和撤销阶段具有较低的计算成本。