Research And Implementation On Blockchain-Based Authentication Scheme For Vehicle Sensor Network

As a critical symbol of the future “Smart City”,the Internet of Vehicles strengthfully supports real-time traffic information services via comprehensively perceiving the road and traffic,performing data interaction in large-scale and large-capacity among multiple systems involving traffic condition and vehicle status.However,due to the inherent open and mobile characteristics of wireless sensor networks,vehicle communication security has been exposed to serious threats.Anonymous authentication schemes are regarded as the first line of defense against the cyber attacks,ensuring user privacy and vehicle communication security.The vehicle nodes are permitted anonymous identity authenticity and message validation,with support of online authenticated key negotiation at any time for subsequent communication preserve,which is of great significance to the secure application and further development for the Internet of Vehicles.Existing authentication architectures,such as certificate based(huge certificate maintenance cost),and identity based(key escrow problem),cannot fully meet the practical security and availability needs.Blockchain is a new application mode combining distributed data storage,point-to-point transmission,consensus mechanism with cryptography.Its characteristics of multi-party maintenance,openness and transparency,traceability and tamper proof are naturally adapted to the reshaping of decentralized high-security identity authentication model.However,many blockchain-based research efforts remain the architecture level,and suffer from security and performance bottlenecks for practical deployment.Motivated by the above challenges,this paper designs a blockchain-based privacy-preserving authentication scheme for the Internet of Vehicles,with the main goal of addressing the security and performance drawbacks aforementioned.Specifically,the main contributions of this paper are as follows.1.We analyze and summarize the reasons for security defects and low efficiency of current authentication models(certificate-based,identity-based)for the Internet of Vehicles,and design a new authentication model based on blockchain technology,ultilizing smart contracts for public key management,implementing functions including identity authentication,trust extension,communication authentication,key update,password update and vehicles revocation.2.We reduce the security of the authentication scheme to the hardness of the elliptic curve ECDH problem.The provable security of the scheme is proved by the interactive game with an adversary under the random oracle model.This authentication scheme meets the basic requirements of secure communication for the Internet of vehicles.In particular,anonymous authentication,message unlinkability,and so on.3.We implement a prototype for all functional modules based on the fabric permissioned blockchain platform and MIRACL cryptography library.A statistic on computation and communication overhead for each participant is formulated under the BN elliptic curve with128-bit security strength.Performance analysis shows that the designed scheme possesses deployable capability in the context of the Internet of Vehicles,compare with related research efforts.