An Efficient and Secure Identity-based Conditional Privacy-Preserving Authentication Scheme in VANETs

Xianglong Wang ； Qiuting Chen ； Zhenwan Peng ； Yimin Wang

《International Journal of Network Security》 24卷4期 (2022/07) Pp. 661-670

https://doi.org/10.6633/IJNS.202207_24(4).08

摘要

The existing conditional privacy-preserving identity-based schemes confront the high cost of pseudonym generation and key leakage in Vehicular ad-hoc networks (VANETs). We propose a new anonymous authentication scheme based on identity, aiming to address these issues. In this scheme, the pseudonym of the vehicle is generated by a roadside unit (RSU), reducing the computational pressure of trust authority (TA) or other pseudonym-generating entities. The complete private key of the message signature consists of partial private keys of TA, RSU, and OBU. If adversaries want to generate a legal message signature, they need a complete signature key. As a result, malicious vehicles in VANETs will be easily revoked as long as RSU stops providing pseudonyms and corresponding private keys. The analysis and performance evaluation of the proposed scheme indicate that the scheme has low revocation cost and high message verification and communication efficiency.

關鍵字

Vehicular Ad-hoc Networks (VANETs) ； Conditional Privacy-preserving ； Revocation