A vanets location privacy protection system and method based on virtual mix-zone

Abstract

A virtual Mix-zone-based VANETs location privacy protection system and method. The third-party trust agency issues public-private key pairs, pseudonyms and certificates to the vehicle node and roadside unit where the vehicle unit is located during the initialization phase; the control server detects the pseudonym replacement of the vehicle node, and is responsible for the process of vehicle node pseudonym replacement, reputation value issuance and update; The vehicle node switches between different roadside units during the moving process, and the vehicle unit requests to establish a virtual Mix-zone when the current pseudonym of the vehicle node is about to expire and no other vehicle nodes request to establish a virtual Mix-zone. The present invention applies the location privacy protection scheme based on virtual Mix-zone to the location privacy protection of vehicle nodes in VANETs, ​​effectively improving the privacy protection strength of vehicle nodes when the vehicle density is unstable; using the reputation mechanism to encourage selfish vehicle nodes to cooperate and replace Pseudonyms can effectively ensure that the target vehicle can search for a certain number of partners, and further ensure the location privacy protection strength of the vehicle node.

Description

technical field [0001] The invention belongs to the technical field of network security, in particular to a virtual Mix-zone-based VANETs location privacy protection system and method. Background technique [0002] With the rapid development of mobile ad hoc networks and wireless sensor technology, vehicle ad hoc networks (vehicularad hoc networks, VANETs) appear and spread rapidly. VANETs is a specific application of mobile ad hoc network and wireless sensor technology in the field of intelligent transportation. It is a self-organizing and distributed inter-vehicle communication network. VANETs are composed of on-board unit (OBU) and roadside unit (RSU), allowing vehicles to communicate with other vehicles (vehicle-to-vehicle, V2V) or roadside infrastructure ( Vehicle-to-infrastructure, V2I) to build a multi-hop communication network between vehicles, vehicles and roadside infrastructure. VANETs can provide users with real-time traffic information (such as congestion, acc...

AI Technical Summary

Problems solved by technology

However, in the conventional Mix-zone scheme, the vehicle density is small and the cooperative vehicle nodes are scattered, which may lead to a decrease in the location privacy intensity.

Establishing a virtual Mix-zone can achieve a higher privacy intensity when the vehicle density is unstable, but the footprint signature set will bring a large calculation and communication overhead

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