A hierarchical security architecture of VANET

VANET security has attracted increasing attention from scholars with far-reaching research development. Only when both security of VANET and transportation are guaranteed, civil life and property security are surely defended. After highlighting the urgency and complicacy in solving the VANET security concern by the system, we confirm that security system architecture serves as a protective shield against overall threats. Targeted at all risks and challenges VANET is confronted with, this article summarizes existing security system architecture for the time being, sorted generalizes current architectures according to backstop technologies and specifies characteristics and technical issues in separate security system architecture respectively based on PKI, ID and situation modelling. The hierarchical framework of VANET Security System Architecture is significantly stressed on, as the whole secure background in VANET relies on bilateral coordination of self-accomplishment in each hierarchy and mutual support for one another. Core technology applicable in each hierarchy for VANET is identified and future breach for relevant research is exposed.