关键词: 车载自组织网络, 隐私保护, 身份认证, 匿名认证

Abstract: In this paper, it proposes an identity-based anonymous authentication scheme in VANET to preserve users’ identity privacy. This scheme achieves the goals of mutual anonymous authentication not only between Road Side Unit （RSU） and On Board Unit （OBU）, but also between OBU and OBU. The proposed scheme uses the technology of identity-based cryptography, such that the system does not need the load of managing public key certificates and further the units do not require the additional computations to verify the other’s certificate yet. Finally, it proves the security of the proposed scheme and analyzes its complexity. The analyzed results show that the proposed scheme is not only secure, but also easy to implement since it needs low costs in both computation and communication complexities.

Key words: vehicular ad hoc networks, privacy preservation, identity authentication, anonymous authentication