RGH: An Efficient RSU-Aided Group-Based Hierarchical Privacy Enhancement Protocol for VANETs

摘要

VANETs are gaining significant prominence from both academia and industry in recent years. In this paper, we introduce an Efficient RSU-aided Group-based Hierarchical Privacy Enhancement Protocol for VANETs. The protocol exploits the Road-Side-Unit (RSU) to form a temporary group based on the vehicles around it. As the group leader, the RSU takes charge of the verification of the member car through the Revocation List from the DoT (Department of Transportation). The RSU also generates the session key and determines the configuration for the group. The RSU handles the message from the group member, and then sends it to other group members. RSUs have hierarchical security because of the real environment secure threats. RSUs are divided into High-level RSU (HRSU) and Low-level RSU (LRSU). HRSU inserts a message-related trace entry into the trace log while LRSU attaches trace Tag on the message. HRSU has to submit the trace log to the Department of Audit (DoA) by secure way periodically. If required, DoA can trace out the disputed message's real signer with the cooperation of the DoT. Comparison with other existing classic schemes in the literature has been performed to show the efficiency and applicability of our scheme.