Vehicle node location privacy protection method in vanets based on encrypted mix-zone

Abstract

The invention provides a vehicle node position privacy protection method in VANETs based on encrypted Mix-Zone, and relates to the technical field of network security. After each vehicle node enters VANETs, ​​its vehicle units have undergone security authentication. After confirming that the vehicle nodes are legal, they can communicate securely. Trusted vehicle nodes can negotiate symmetric keys for subsequent secure communications; the vehicle unit OBU is about to When it expires, and it is located in an area without RSU deployment, negotiate with other vehicle nodes for the group key; in an area not covered by RSU, when the pseudonym of the vehicle node is about to expire and no other vehicle nodes request to open the encrypted Mix-zone, An encrypted Mix‑zone is established, and the vehicle nodes whose pseudonyms are about to expire after receiving the request cooperate to change their pseudonyms. The invention effectively improves the privacy protection strength of the vehicle nodes, effectively solves the location privacy threat faced by the vehicle when the RSU fails to fully cover the vehicle network at the initial stage of construction, and reduces the loss caused by intermediate key generation and group key update .

Description

technical field [0001] The invention relates to the technical field of network security, in particular to a vehicle node position privacy protection method in VANETs based on encryption Mix-Zone. Background technique [0002] In recent years, with the rapid increase of vehicle users, road traffic safety has become a global public safety issue. How to improve the existing traffic safety situation has gradually become a hot topic in academic research. hoc networks, VANETs) came into being. The vehicle self-organizing network has brought revolutionary changes to the transportation system. It is an important part of the intelligent transportation system and shoulders the important responsibility of ensuring people's travel safety and improving vehicle traffic efficiency. [0003] The basic idea of ​​the vehicle ad hoc network is that vehicles within a certain range of movement can exchange the obtained road condition information data with each other, and connect to establish an...

AI Technical Summary

Problems solved by technology

However, in the conventional Mix-zone scheme, vehicle nodes can only change pseudonyms in a fixed area, which often brings great inconvenience to vehicle nodes. If vehicle nodes cannot change pseudonyms in the Mix-zone area in time, it will not be easy well protect your privacy

And in the initial stage of vehicle self-organizing network construction, the RSU deployment area is not extensive, and there are a lot of blank areas

In this part, the vehicle node cannot use RSU to generate the group key required to build an encrypted area, and cannot establish an encrypted area to protect the location privacy of the vehicle

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