Emergency message spreading method and system based on trust cascading in Internet of Vehicles

Abstract

The invention discloses an emergency message spreading method and system based on trust cascading in the Internet of Vehicles, and the system comprises an authority mechanism, a road side unit, and avehicle. The authority mechanism is responsible for providing registration and revocation services for the vehicle, and storing and updating the trust information of the vehicle. The road side unit provides a communication interface for the vehicle and the authority mechanism; the vehicle-mounted unit is installed on a vehicle and can communicate with the adjacent road side unit and other vehicles. When an emergency event occurs, an emergency message can be spread among nearby vehicles in a trust cascade manner, in which an entity-oriented trust value (which can be evaluated and updated by a trust certificate and included in the trust certificate) is used as an important weight; according to the method and system, the entity-oriented trust value is efficiently applied to data-oriented trust evaluation, and compared with an existing message spreading mode, the evaluation result is more accurate and has a good incentive mechanism, error tolerance, compatibility and robustness.

Description

technical field [0001] The invention relates to the technical field of Internet of Vehicles security, in particular to a method and system for disseminating emergency messages based on trust cascading in the Internet of Vehicles. Background technique [0002] Collaborative safety applications are one of the most watched research branches in the Internet of Vehicles, in which vehicles can obtain a farther perspective and a wider range of road information through "vehicle-vehicle" message transmission, and through "vehicle-roadside Information transfer between "units" can obtain more quantity and higher quality information. Cooperative safety applications allow drivers to intelligently perceive the state of surrounding vehicles and roads, and make advance decisions on external affairs, greatly reducing the urgency of their actions to avoid traffic accidents, thereby improving road safety and driving comfort. However, due to its large-scale, open, distributed, sparse, and high...

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Problems solved by technology

[0004] Li et al [Li, Q., Malip, A., Martin, K.M., Ng, S.L., & Zhang, J. (2012). Areputation-based announcement scheme for VANETs. IEEE Transactions on Vehicular Technology, 61(9), 4095- 4108.] propose a reputation-based trust model in which the authority is responsible for storing and updating each vehicle’s trust information, but this model considers each message sender’s messages in isolation and completely ignores data-oriented trust, so its practical performance is limited

Ostermaier et al [Ostermaier, B., Dotzer, F., & Strassberger, M. (2007, April). Enhancing the security of local danger warnings in vanets-a simultaneous analysis of voting schemes. In The Second International Conference on Availability, Reliability and Security ( ARES'07)(pp.422-431).IEEE.] proposes a trust model based on voting, in which the message receiver considers multiple messages reporting different states of an event at the same time to comprehensively evaluate the quality of the message, but the model is completely Ignores entity-oriented trust, and gives equal weight to messages from honest vehicles and malicious vehicles, so its practical performance is poor

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