VANET access authentication method adopting identity-based short group signatures

Abstract

The invention provides a VANET anonymous access authentication method adopting identity-based short group signatures. The method comprises the following steps: each valid on-board unit obtains a private key, a signature public key, an initial pseudonym, and an initial trust value issued by a third-party trusted authority; each valid roadside unit obtains a signature private key, a signature public key, a group private key, and a group public key issued by the third-party trusted authority; two-way access authentication is carried out between each on-board unit and the corresponding roadside unit upon first access to a VANET by each on-board unit; one certain on-board unit signs a message and sends the signed message through broadcasting, and the on-board unit receiving the message authorizes a signature; a real identity of each on-board unit is calculated when the on-board unit is a malicious node or the real identity needs to be revealed; and the VANET carries out identification and revocation on the malicious nodes. The method provided by the invention has the advantages that an identity-based short group signature scheme is applied in the process of mobile communication among vehicle nodes of the VANET protocol, so that the identity-based short group signatures can be used to effectively protect the privacy of the vehicle nodes; and the malicious nodes can be efficiently and accurately identified and revoked through an evaluation mechanism, so that high scheme security can be effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of network security, in particular to a VANET authentication method based on identity short group signatures. Background technique [0002] Vehicular ad hoc networks (VANETs for short) is a wireless local area network (WLAN) technology that uses vehicle units and roadside units as network nodes to provide communication between vehicle units and vehicle units, and between vehicle units and roadside units. Mobile network created for the service. VANET is an application of wireless Mesh network. Wireless Mesh network is also called wireless mesh network or wireless mesh network. It combines the advantages of wireless local area network WLAN and AdHoc network. The internet. At the same time, the layered topology of the wireless Mesh network can provide reliable transmission, global coverage, good scalability, and low initial investment. It is an ideal solution for wireless broadband access to the Internet. ...

AI Technical Summary

Problems solved by technology

[0007] (4) No correlation: Other vehicle nodes cannot analyze the whereabouts of a certain vehicle node based on the received information, that is, it is impossible to determine that several messages are sent by the same vehicle node based on the received messages

Some contributions and achievements have been made in solving the problems of vehicular ad hoc network authentication or privacy protection, but some schemes improve the security of the scheme but ignore the efficiency of authentication, or improve the efficiency but ignore the privacy protection of users , cannot meet the requirements of VANET secure and efficient access authentication

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