Vehicle-mounted-network anonymous-communication system based on ring signature and method

Abstract

The invention relates to the technical field of network security, and provides a vehicle-mounted-network anonymous-communication system based on ring signature. The system includes a third-party trustinstitution, road side units and vehicles. The invention also provides a method of using the above system for vehicle-mounted-network anonymous-communication. The third-party trust institution firstly publishes public parameters, then the vehicles and the road side units apply for registration to the third-party trust institution, the third-party trust institution issues pseudonyms and public andprivate keys for the vehicles, and issues public and private keys and initial pseudonym ring members for the road side units, and then states of the vehicles in a vehicle-mounted network are monitored; and initial accessing authentication is carried out with a road side unit RSU if a vehicle accesses the vehicle-mounted network for the first time, and switching accessing authentication is carriedout with a road side unit RSU' if the vehicle does out access the vehicle-mounted network for the first time, and two-way authentication is carried out under assistance of a road side unit if a vehicle Vi is ready to communicate with a vehicle Vj. The system and the method integrate pseudonym certificate and group signature technology, and can fully protect privacy safety of communicators on thepremise of ensuring authentication efficiency.

Description

technical field [0001] The invention relates to the technical field of network security, in particular to an anonymous communication system and method for a vehicle network based on a ring signature. Background technique [0002] Today, with the rapid development of the transportation industry and the communication industry, people's demand for traffic congestion information query, safe driving and various entertainment provided by the network is increasing during driving. The in-vehicle network, as a network that mainly provides communication for vehicles at present, can dynamically transform the network topology structure during the fast driving process of the vehicle, and provide continuous and stable communication services. However, in order to ensure the timely accessibility of communication messages, all messages sent by vehicles are sent in the form of broadcast, and any communication device around the vehicle can receive the messages sent by the vehicle, which makes ...

AI Technical Summary

Problems solved by technology

However, when both parties are successfully authenticated, in some specific application scenarios, the vehicle needs to present relevant identity information to obtain certain application services, and if it relies on group signatures, the vehicle only informs the other party of the identity of the group owner rather than its own Identity information, which makes it difficult for vehicles to obtain relevant application services in an effective way

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