Research And Implementation Of Security Authentication Mechanism In Vanet

VANET closely combines wireless communication technology with modern automobile technology to provide real-time traffic information and effective safety protection for car network managers and vehicle drivers.However,the Internet of Vehicles is also facing many security and privacy issues while providing people with a better driving experience,road safety and other services.Due to the broadcast characteristics of wireless channels,communications in the Internet of Vehicles are vulnerable to various attacks,such as eavesdropping,replay attacks,tampering attacks,and forgery attacks.If the Internet of Vehicles is to be officially put into use,it must be ensured that those high-speed vehicles in the Internet of Vehicles can fully trust the information used for analysis and decision-making.The security authentication mechanism establishes the trust system of each entity in the Internet of Vehicles,realizes the verification of the legality of the identity,and ensures the normal progress of the security communication of the Internet of Vehicles.This paper mainly studies the security authentication mechanism of the Internet of Vehicles,and proposes a security authentication scheme based on certificateless aggregation signature to realize the safe and effective authentication of information transmission between vehicle nodes in the Internet of Vehicles.The main work of this paper is as follows:·Proposed a certificateless aggregate signatures(CLAS)-based car networking security certification scheme CPBA(Conditional Privacy-preserving Batch Authentication Scheme).This scheme is based on elliptic curve encryption certificateless aggregate signature,which improves the efficiency of the signature and verification phase,which not only solves the key escrow problem,but also guarantees the security of the vehicle private key.Security analysis verifies that the scheme can effectively resist replay attacks,forgery attacks and collusion attacks.The performance evaluation shows that CPBA has better performance in terms of communication efficiency and computational overhead compared with existing schemes.·Aiming at the distribution and management of domain keys involved in the CPBA security authentication scheme above,a key distribution method based on the management of the Internet of Vehicles domain members based on the CPBA scheme is proposed.The authoritative agency TA conducts sub-regional management of the Internet of Vehicles,and uses the Chinese remainder theorem(CRT)to realize the broadcast distribution and update of the domain key,ensuring that legitimate vehicles can obtain the domain key for secure communication,thereby achieving The purpose of vehicle revocation is to solve the problem that the vehicle must store and query the certificate revocation list(CRL),while ensuring the legitimacy of VANET safety messages,while not causing a lot of overhead to the Internet of Vehicles.And through experiments to analyze the TA service rate and draw conclusions.·The security authentication mechanism proposed in this paper is designed and implemented in the Veins simulation platform.Firstly,the functional analysis of the main functional entities is carried out,and the design and implementation of the five entities of the authority(TA and KGC),RSU,and vehicles are given.Analyze the performance of the safety certification mechanism based on the feedback data output by the simulation platform,and draw conclusions.