Research On Efficient Digital Signature Technology In Internet Of Vehicles

With the rapid development of wireless communication technology,automatic driving technology in vehicle Ad-hoc network has gradually entered the market stage from the laboratory,mature automatic driving technology can bring comfortable experience for people's travel.At the same time,efficient authentication and privacy security in vehiclemounted Ad-hoc networks have become important topics of concern to governments and the public,as well as hot issues in academic and applied technology fields.This work studied the key security issues such as efficient signature,invalid signature detection and automatic driving position privacy in the vehicle-mounted self-organizing environment,so as to avoid joint attacks by malicious vehicles and security threats to passengers' privacy caused by vehicle location information leakage.The achievements mainly include three aspects.1.A certificateless authentication and aggregation signature scheme ICASA is proposed.In this scheme,a list of random numbers is introduced into the verification equation,and the corresponding communication is transmitted through the verification unit.The joint attack problem is solved without significant increase in computation cost and time complexity.The analysis and verification show that the scheme is safe and effective against two typical attack modes: adaptive selective message attack and joint attack.2.A bitwise invalid signature detection algorithm FBD and its optimization and improvement algorithm EFBD are proposed.In this algorithm,the nodes are numbered in binary first,and then the effective signature groups are screened out by aggregating signatures in group by bitwise grouping? then the invalid signature groups are verified one by one.The optimization and improvement algorithm adds an early stop bit allocation mechanism on the basis of the above,which accelerates the detection efficiency.Simulation results show that,under parallel conditions,compared with binary-search-based algorithms,the new algorithm has better performance when the number of invalid signatures is small.3.A dynamic hybrid zone construction scheme for autonomous vehicle fleet is proposed.In this scheme,by differentiating the priorities inside and outside the fleet,the cooperation requests are first forwarded within the autonomous driving fleet,and then forwarded outside the autonomous driving fleet,and a dynamic mixing zone is established,through which the location privacy of vehicles is protected.The verification results show that the proposed scheme has obvious advantages over existing schemes in feasibility and performance.This work focuses on the authenticity,efficiency and security of signature in vehicle Ad-hoc network,and provides corresponding algorithm solution to solve the problem of location privacy protection in the process of autonomous driving.The research work done has provided the corresponding theoretical basis and application solution for the application and popularization of vehicle Ad-hoc network.