Location Privacy Protection of IoV based on Blockchain and K-anonymity Technology

Abstract

The exposure of the real location of vehicles in the positioning service may lead to the disclosure of the important information of users. There are few comprehensive studies on the privacy security and delay of the vehicle positioning service, and less consideration is given to the combination of satellite network, UAV network and ground network to ensure vehicle positioning service More reliable, longer lasting and more flexible. We consider the application of anonymous privacy protection technology to reduce the leakage risk of real vehicle location and the deployment delay, and proposes the location privacy protection architecture of the Internet of Vehicles under the Space-Air-Ground Integrated Network (SAGIN), roadside service units (RSU) act as ground receiving devices. We propose a fast clustering K-anonymity privacy-preserving algorithm to reduce the time complexity of the K-anonymity algorithm while the probability of the real vehicle location being found does not exceed 1/K, and proposing evaluation-rating combined trust model to solve the problems of non-trust of the requesting vehicle and the cooperative vehicle during the construction of the anonymous area of the K-anonymity algorithm. Applying blockchain technology to store vehicle location privacy data, distributed ledger and fast Byzantine fault tolerance consensus mechanisms ensure that stored data cannot be tampered with while speeding up deployment. Simulation experiments indicate that our scheme is better than some existing studies in terms of time delay and safety, and can identify malicious vehicles with fast speed and high accuracy.