Vanets anonymous authentication system and method based on id-based group signature

Abstract

The present invention relates to the technical field of wireless network security, and provides a VANETs anonymous authentication system based on an ID-based group signature, including a third-party trust agency, a roadside unit and a vehicle unit, and the third-party trust agency and the vehicle unit are connected through the roadside unit. communication. The present invention also provides a method for anonymous authentication using the above system. The third-party trust organization generates initial pseudonyms, initial trust values ​​and signature private keys for vehicle units, and generates signature private keys, group private keys and group public keys for roadside units. Finally, the vehicle unit and the roadside unit execute the V2I authentication protocol, and the vehicle units execute the V2V authentication protocol and generate a shared key when both are legal. Finally, the roadside unit assists the third-party trusted organization to track the real identity of the vehicle unit that sent the malicious message , and further processed. The invention can ensure the anonymity of vehicle node identities, avoid certificate storage and management expenses, and improve privacy protection strength and authentication efficiency.

Description

technical field [0001] The invention relates to the technical field of wireless network security, in particular to an ID-based group signature-based VANETs anonymous authentication system and method. Background technique [0002] In recent years, with the rapid development of mobile ad hoc (AdHoc) networks and the Internet of Things (IoT), intelligent transportation systems have become a research hotspot in both academia and industry. Vehicle Adhoc Networks (VANETs), as an important part of the intelligent transportation field, is an effective technology that can provide a wide range of security applications for vehicle users. The basic information unit uses technologies such as wireless access to connect road entities such as vehicles and roadside infrastructure with the traffic network to form an intelligent network. It relies on trusted authorization and authentication centers (Trust Authorities, TAs), vehicle units (Road-Side-Unit, RSU) and roadside units (On-Board-Unit...

AI Technical Summary

Problems solved by technology

Although these methods can achieve identity privacy protection to a certain extent, they all need to maintain a large number of anonymous certificates or anonymous identities, resulting in a large cost of certificate and key management and storage.

With the rise of identity-based cryptography, because it can better solve the above key management problems, many identity-based anonymous access authentication methods for VANETs have been proposed, but these methods have not yet formed a complete and mature solution to take into account Realize identity authentication, privacy protection, and identification and revocation of malicious nodes in VANETs in a safe and efficient manner

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