Vehicle node location privacy protection method in VANETs based on encrypted Mix-Zone

Abstract

The invention provides a vehicle node location privacy protection method in VANETs based on encrypted Mix-Zone, which relates to the technical field of network security. After entering the VANETs, each vehicle node can communicate safely with its vehicle unit through security authentication, and the trusted vehicle nodes can negotiate symmetric keys to communicate securely after the VANETs are confirmed to be legal. When the pseudonym is about to expire and the vehicle unit OBU is located in an area without RSU deployment, the vehicle unit OBU and the other vehicle nodes jointly negotiate a group key. In areas not covered by the RSU, the vehicle node's pseudonym is about to expire and no other vehicle node has requested to start encrypted Mix-Zone establishment, encrypted Mix-Zone is established, the vehicle node that receives the requested pseudonym that is about to expire cooperates to change the pseudonym. The invention effectively improves the privacy protection intensity of the vehicle node, effectively solves the position privacy threat faced by the vehicle when the RSU is not fully covered in the initial stage of the vehicle-mounted network construction, and reduces the losscaused by the intermediate key generation and the group key renewal.

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 ad hoc 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 ad hoc n...

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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