A vanet-oriented conditional anonymous authentication method without certificates and signatures

Abstract

The invention discloses a VANET-oriented conditional anonymous authentication method without using a certificate and a signature. The method comprises the following steps that a user applies to join Internet of Vehicles, a TA stores vehicle information ID and distributes a private key to a vehicle, the TA judges whether a private key and the distributed private key are repeated, if yes, the private key is distributed again, and if not, the private key distributed by the TA serves as the private key of the TA; a sender vi sends an MAC code (formula) of a message m; when the vehicle vj receivesthe message cert(m), the vehicle vj carries out verification by utilizing (formula) in the own private key in order to judge whether to receive the message; and if the message is discovered to be themalicious message after the message is received, the TA traces the malicious vehicle to complete the authentication. The present invention does not use the certificate and the signature, a complicatedcertificate management problem cannot exist, the method has the advantages of high efficiency and high practicability, and the security attributes such as private key reliability, anonymous authentication, traceability, irrelevancy, non-repudiation, cancelability and the like are met.

Description

technical field [0001] The invention belongs to the technical field of Internet of Vehicles security, and in particular relates to a VANET-oriented conditional anonymous authentication method without certificates and signatures. Background technique [0002] As the application of mobile ad hoc network technology in the transportation field, the Internet of Vehicles has become an important part of the future intelligent transportation system. The use of Internet of Vehicles technology can improve road traffic conditions, reduce vehicle accidents, and provide customized entertainment services, making driving safer, more convenient and more comfortable. In VANET, a vehicle equipped with an on-board unit (OBU) can communicate with others wirelessly, called V2V communication, or with a fixed roadside unit (RSU), called V2R. Through V2V or V2R communication, vehicles share their traffic information, such as the vehicle's identity, driving speed, direction, road conditions, locati...

AI Technical Summary

Problems solved by technology

Considering the number of vehicles in VANET, TA may become a bottleneck for vehicle certification

In the anonymous authentication scheme proposed by Maria et al. in 2017, its anonymous certificate is also generated by the vehicle itself, but the anonymous identity of the vehicle is not updated in this scheme, which means that their scheme does not support unlinkability

However, the scheme is based on a special bivariate polynomial with anti-collusion and homomorphism. There is no effective way to construct such a polynomial that satisfies security and high efficiency, so the scheme is not feasible.

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