Research On V2X Group Authentication Technology Based On Alliance Chai

Vehicle Ad-hoc Network(VANET),as a part of the Internet of Things,is a key technology to realize intelligent transportation,smart city and driverless driving.It has attracted wide attention in recent years,but the openness and complexity of the network also make it face more security and privacy challenges,and identity authentication is the foundation to resist various attacks.Traditional solutions typically use public key infrastructure,identity-based signature,or cryptographic-based algorithms,but these solutions either incur high computational and storage costs,or have issues with certificate issuance,revocations,management,or centralization.In recent years,blockchain,a distributed network,is utilized as a new idea for identity authentication in VANET due to its decentralized,immutable,traceable and other native characteristics,a lot of researches have introduced blockchain on the basis of traditional solutions to achieve security effects,such as storing some necessary identity information in on-chain ledgers or distributing nodes,but there still exist performance challenges such as storage and latency.In view of the above problems,this paper will use consortium chain technology to design and evaluate an identity authentication scheme in VANET.The main contributions of this paper are as follows:1)This paper proposes an RSU grouping authentication scheme based on consortium chain in VANET.First,the system uses blockchain technology to achieve decentralized,tamper-free and traceable security features.Secondly,a new data structure called token based on UTXO is introduced and improved.At the same time,a set of online operation functions related to authentication transaction are designed.Token is a prerequisite for initiating online operations,so that the authenticity of the entity can be proved through the transactions on the chain rather than through certificates,thus solving many certificate management issues.Furthermore,a grouping authentication scheme based on RSU is proposed.Once the vehicle joins the RSU group,it only needs to perform one online operation instead of the whole authentication process to reduce computing and communication overhead and optimize system performance.2)Using the mathematical tool of queuing theory to model and analyze the system.Considering that the authentication service will be carried out after the vehicle arrives at the designated RSU area with certain rules,and with the increase of the number of vehicles in the group,the transmission cost of authentication will also increase,and the quality of service of the system may be affected.Therefore,this paper uses the queuing theory to model and analyze the process of vehicle arrival and authentication service.The relationship between the system service performance and queueing theory related descriptive indexes is presented through experimental results.3)The problem of multi-RSU cross-group identity authentication is studied.Since there are multiple RSUs deployed on a road section,the RSU group that the vehicles join is uncertain.Two vehicles that are close to each other and have certification requirements may belong to different RSU groups.Therefore,this paper also studies how to carry out cross-RSU certification for vehicles belonging to different RSU groups.4)A comprehensive theoretical analysis of the security requirements of the proposed scheme is carried out.Meanwhile,the proposed scheme is implemented in the Hyperledger Fabric platform and the security and performance analysis is done to prove the effectiveness of our scheme.