Research On Lightweight Privacy-Preserving Authentication In Vehicle Ad Hoc Networks

As a representative technology in the field of intelligent transportation system,vehicle selforganizing network has become the most enthusiastic research target of researchers in academia and industry in recent years.Since in the vehicle ad hoc network,the transmission of information between entities mostly occurs in the open channel,which makes it relatively easy for attackers to launch attacks on the messages in transit in the system.In addition,privacy protection is crucial for participants in the network,because most vehicles participating in providing information do not want to reveal their private information.Therefore,privacy protection issues and communication security issues are urgent issues to be solved in current vehicle ad hoc network-related authentication technologies.In addition,the requirements of real-time communication,bandwidth rate,and massive terminal links require relevant authentication schemes to ensure system security and privacy protection,as well as low latency for mutual authentication of entities in the scheme,and to reduce computational and communication overhead as much as possible.Make sure that the payload side and the authentication side do not create authentication bottlenecks.In response to the above requirements,this paper designs two authentication schemes based on different cryptographic technologies in the Internet of Vehicles scenarios.The main contributions of this paper are as follows:(1)This paper proposes a PUF-based lightweight privacy protection batch authentication scheme for the Internet of Vehicles.The scheme only uses basic encryption and decryption operations,such as symmetric encryption,XOR,and hash functions,to achieve low-latency V2 I communication;PUF avoids physical attacks and fake attacks;it realizes the privacy protection of vehicles by setting fake names.Through rigorous security proof and detailed security analysis,it is shown that the scheme can achieve the security objectives in the vehicle network.Since the scheme adopts lightweight encryption and decryption operations and supports batch verification,compared with the existing schemes,the scheme proposed in this paper shows better performance in terms of computational overhead and communication overhead.(2)This paper proposes a blockchain-based lightweight V2 I switching authentication protocol for the Internet of Vehicles.Vehicles can authenticate to other RSUs using only hashing and XOR operations;the protocol avoids offline use of smart cards through PUF.Password guessing attack;if the RSU detects the abnormal behavior of the vehicle,it can immediately notify the revocation of the vehicle through the blockchain network,that is,malicious vehicle revocation can be performed without the help of the TA.Moreover,rigorous security proofs and detailed security analysis show that the protocol can achieve security goals in in-vehicle networks.The protocol uses lightweight encryption and decryption operations,instead of the more complex bilinear mapping operation in cryptography,but uses the elliptic curve encryption algorithm.Compared with the existing protocols,the protocol proposed in this paper shows better performance in terms of computational overhead and communication overhead.