Certificate Revocation Schemes in Vehicular Networks: A Survey

Abstract

The problem of security in vehicular networks is a vital issue and attracts researchers' increasing attention for its unique characteristics, such as the vulnerability of wireless media, untrusted communication environment, and closely relationship with human lives and privacy. Authentication is an effective means to ensure the security of communication and provide trust. Authorized vehicle should be revoked if the vehicle become compromised. Designing an efficient revocation mechanism for vehicular networks is a challenging task because of the diverse security requirements and the unique network characteristics. Thus, a large body of work emerged in recent years, proposing revocation schemes tailored to vehicular networks. In this paper, we provide a comprehensive survey on revocation schemes in vehicular networks. Firstly, we investigate existing revocation schemes systematically and classify these schemes based on the location where the revocation information has been placed. Secondly, we divide the whole revocation process into three stages: 1) the resolution of revocation information, 2) the distribution of revocation information and 3) the use of revocation information. Typical works in each stage of the revocation process have been reviewed and we also point out the challenging problems and key enabled techniques in each stage.