Safe and efficient data sharing method for Internet of Vehicles based on DAG block chain

Abstract

The invention discloses an Internet of Vehicles secure and efficient data sharing method based on a DAG block chain, is applied to the technical field of Internet of Vehicles security and block chains, and provides a vehicle reputation management mechanism based on the DAG block chain for solving the problems of security, timeliness and the like of Internet of Vehicles data sharing. According to the method, the reliability of message release of the vehicle is effectively judged through the historical transaction of the vehicle, and a credible vehicle reputation value is provided for the DAG block chain in real time; secondly, a biased random walk consensus mechanism based on priority and reliability is provided to perform consensus on transactions of the unloading tasks, delay time requirements of the tasks under different emergency degrees are ensured, and damage to data sharing caused by hostile attacks in the Internet of Vehicles is prevented; and finally, a delayed optimal collaborative unloading scheme based on particle swarm optimization is provided, an optimal data sharing scheme is solved according to unloading tasks, vehicles and block chain parameters, and safe and efficient data sharing of the Internet of Vehicles is realized.

Description

technical field [0001] The invention belongs to the field of car networking security and block chain technology, and in particular relates to a car networking data sharing technology. Background technique [0002] The Internet of Vehicles realizes real-time information interaction among vehicles, infrastructure, pedestrians and servers through wireless communication technology and sensing technology, improving the efficiency and safety of the transportation system. With the maturity of intelligent transportation systems, a large number of computing-intensive and delay-sensitive in-vehicle applications have emerged, making it difficult for vehicles with limited computing and storage resources to meet the computing needs of these tasks. Task offloading is considered to be an effective way to improve the efficiency of task computing. Vehicles use the idle resources of neighboring vehicles to perform collaborative task offloading to ensure that different types of applications co...

AI Technical Summary

Problems solved by technology

[0005] Most of the existing methods do not take into account the inaccurate sharing of information between vehicles caused by the movement of vehicles, lack of reliable judgment on the credibility of information released by vehicles; or ignore the DAG blockchain confirmation time for different types of business security collaboration unloading The impact of delay, the efficiency of data sharing cannot be guaranteed

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