Research On Privacy Protection And Security Authentication Technology In Internet Of Vehicles

Vehicle Ad Hoc Network(VANET)plays an important role in intelligent transportation,which can reduce the risk of traffic accidents for drivers and provide a variety of entertainment facilities.However,due to the open communication nature of VANETs,information transmitted by vehicles is vulnerable to security attacks.In recent years,many solutions to the above problems have been proposed,but most of them have large computational and communication overheads.In the practical application scenario of the Internet of Vehicles,vehicle access to the network will go through the registration and authentication process.The authentication of vehicle access control is an important security service for communication between vehicles and between vehicles and roadside units.All messages should not be changed during transmission.At the same time,vehicles must protect against misuse of private information and attacks on their privacy.Furthermore,limited bandwidth,high mobility and vehicle density,and scalability are other challenges faced by VANETSs.In VANETs,providing confidential and secure anonymous authentication is the focus of many research efforts.In this paper,a new certificateless fault-tolerant aggregate signature authentication scheme based on VANETs is proposed.The scheme of this paper avoids the complex certificate management problem in public key infrastructure and the key escrow problem in identity-based framework.Aggregated signatures aggregate different individual signatures on different information from different vehicles into one signature,thereby reducing verification time and storage space for roadside units.However,it is often difficult to deal with the problem of errors in aggregated signatures.Therefore,in this paper,we adopt the construction of fault-tolerant aggregated signatures to achieve the fastest screening of erroneous signature individuals in the aggregated verification process.Previously,RSU would prescreen based on the data packets sent by the vehicle as well as time and location information to further improve the verification speed of the fault-tolerant aggregated signature scheme.The proposed scheme can prevent malicious vehicles from undermining the security features of VANETs.Furthermore,the scheme does not use expensive pairing operations in modern ciphers,thus greatly reducing the amount of computation.Security analysis and performance analysis show that this scheme is safer and more efficient than existing schemes.This paper also proposes a secure communication data transmission scheme for the Internet of Vehicles.In order to ensure privacy,many secure communication protocols have been proposed.However,most of these protocols are one-to-one communication structures and do not support user scenarios with multiple recipients of messages.At the same time,the Internet of Vehicles usually has a negative impact on its performance due to its frequent movement in unsafe areas in various vehicle-dense locations,which makes them vulnerable to many cyber attacks and security threats.In view of its frequent interaction with other vehicles and roadside unit nodes,this paper proposes a certificate-based secure communication data transmission protocol in the Internet of Vehicles scenario,which combines elliptic curve cryptosystem and certificate-based cryptosystem.A new multi-receiver certificateless signcryption scheme is proposed,which uses the pseudonym mechanism to protect the privacy of users,and realizes the secure communication between multiple users of vehicles through certificateless signcryption technology.This scheme has security features such as data integrity and confidentiality,non-repudiation,anonymity,forward and backward secrecy,unlinkability and data freshness.The security and performance analysis shows that the certificateless vehicle networking security communication protocol proposed in this paper is safe,efficient and practical.