Research On Vehicle Privacy Protection Scheme Combining Blockchain And Group Signature In The Internet Of Vehicles

Internet of Vehicles(Internet of Vehicles,Io V)is an application of the Internet in the field of vehicles.The basis of the Internet of Vehicles is the vehicle-mounted mobile Internet,and a large-scale communication network connected to each other through related communication protocols.In the field of intelligent transportation,Io V is the most important component.Io V is responsible for connecting vehicles to each other to achieve the purpose of message sharing and message communication.Due to the open features of Io V,an attacker can intercept real-time broadcast beacon information,and obtain private information such as the driver's habits,vehicle running trajectory,and driver's identity by analyzing the intercepted beacon information.This article analyzes the characteristics,safety challenges and safety requirements of existing vehicle privacy protection schemes,and explains and explains the key technologies in the Internet of Vehicles.Aiming at the problems of public key management,identity authentication,and vehicle identity cancellation in the existing schemes,a vehicle privacy anonymity protection scheme(BGAS)combining blockchain and group signatures is proposed.This solution introduces the blockchain into the process of privacy protection of vehicle identity.In this solution,the vehicle first registers with the group signature group,and the group signature group signs the registered vehicle information and authorizes the CA to communicate with the vehicle.The vehicle that is registered for the first time will store the vehicle's public key in the blockchain when it communicates for the first time.Once the vehicle is found to provide false identity information,the group manager will use the group private key to reveal the signer's identity and authorize the CA to revoke the vehicle's public key.Before communication occurs between the vehicle and the vehicle,the vehicle will generate pseudonyms in an iterative manner and communicate using the pseudonyms.During the communication process,the vehicle obtains the communication information and requests the CA to decrypt the pseudonym and confirm the identity of the vehicle.The receiver needs to use the sender's public key to perform a hash operation to obtain the Merkel roots,and compare the calculated root values with the roots in the blockchain through anonymous authentication to confirm the legitimacy of the vehicle.In order to verify the effectiveness of the scheme,we verified it through simulation experiments.The experiment mainly evaluates the scheme from two aspects of time and space consumption.By summarizing and analyzing the experimental results,it is concluded that the BGAS program is a more significant and reliable program.