VANETs anonymous authentication system and method based on ID-based group signature

Abstract

The invention provides a VANETs anonymous authentication system based on an ID-based group signature, related to the technical field of wireless network security. The VANETs anonymous authentication system based on the ID-based group signature comprises a third-party trust institution, roadside units and vehicle units; and the third-party trust institution communicates with the vehicle units through the roadside units. The invention also provides a method for anonymous authentication using the VANETs anonymous authentication system based on the ID-based group signature; after the third-party trust institution generates an initial pseudonym, an initial trust value and a signature private key for the vehicle units, and generates a signature private key, a group private key and a group publickey for the roadside units, a V2I authentication protocol is performed between the vehicle unit and the roadside unit, and a V2V authentication protocol is performed among the vehicle units, and a shared key is generated when both are legal; and finally, the roadside units assist the third-party trust institution to track a true identity of the vehicle unit sending a malicious message and performfurther processing. The invention can ensure the anonymity of the vehicle node identity, avoid the certificate storage and management overhead, and improve the privacy protection strength and the 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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