Research On The Key Technology Of Data Transmission Security In The Internet Of Vehicles

With the development of intelligent vehicles and communication technology,data security in Io V(Internet of Vehicles)has been paid more and more attention.The primary research carried on in this paper including data tamper-proof,data encryption and identity authentication in Io V.The main work of this paper are shown as follows:1.The security of commonly used encryption algorithms are studied and analyzed based on Kirchhoff principle.Combined with two typical scenarios of data transmission in the Io V,two different secure communication scheme are designed respectively: AES key exchange and data encryption scheme based on trusted central node;and ECC key exchange +AES data encryption scheme based on non-central node.2.A storage data tamper-proof algorithm based on chain storage,hash authentication and CBCMAC algorithm is designed.The relevant experiments show that the designed algorithm has better performance than CBC-MAC algorithm in terms of payload ratio,signature generation time and signature authentication time.3.A method to construct a distributed blockchain based CA(Certificate Authority)system for the identity authentication of communication nodes in Io V is proposed.The mechanism of CA blockchain with mixed structure of dual chain and dual block type is described: The realization of block generation acceleration through authority node update chain;and the security performance guarantee of distributed CA through ordinary link and block confirmation mechanism.The advantages of time,storage space and security performance of blockchain based CA compared with other CA systems are analyzed through experiments.4.A vehicle-mounted data security gateway device is designed with the implementing of the algorithms researched above.The software and hardware of the gateway are developed,and the corresponding computer software is written to verify the gateway function.Through gateway function verification experiment and gateway security communication experiment,the basic functions of gateway and the security communication combining blockchain based CA,tamperproof detection and encrypted communication are verified.Finally,The whole process security protection of data transmission in the Internet of vehicles is realized.