A Pseudonym Changing Strategy for Dynamic Grouping in VANETs

For complex VANETs and highly dynamic vehicles, vehicle location privacy becomes increasingly important. Pseudonyms are commonly used in VANETs to protect location privacy. This scheme mainly aims at the scenario of vehicle driving, and proposes to focus on the maximum driving speed of vehicles, dynamically divide groups according to the driving direction, position and maximum speed of vehicles, and realize the pseudonym replacement of vehicles within the group. The simulation results show that compared with the existing technology, the proposed scheme has improved the frequency of pseudonym replacement and the success rate of pseudonym link.