earticle

영어

Privacy threat is one of crucial issues for the wide deployment of Vehicular Ad-hoc Networks. Due to the open nature of the wireless communications, many kinds of attacks such as eavesdropping and traffic analysis can be launched by various malicious adversaries. Network coding allows intermediate nodes to encode/mix incoming message, thus it can provide a feasible way to thwart effectively eavesdropping and traffic analysis attacks. Inspired by newly developed secure network coding solution, we propose a privacy preservation scheme for online service access in VANET. The proposed scheme can achieve data confidentiality and flow untraceability, and protect the identity and location privacy of vehicles. Moreover, because lightweight coding operation is performed on message content instead of computation-expensive public key encryption, the proposed scheme is much more efficient than traditional privacy preservation scheme, such as Mix-net and Onion Routing based scheme. Finally, security analysis and simulation demonstrate the validity and efficiency of the proposed scheme.