Vehicle-mounted network message authentication protocol

Abstract

The invention provides a vehicle-mounted network message authentication protocol. A vehicle-mounted ad-hoc network comprises a trusted authentication center, a vehicle-mounted unit and roadside units, the message authentication protocol uses a threshold proxy re-signature algorithm to protect vehicle privacy information, the signature of a message by a vehicle-mounted communication unit is converted into the signature of the same message by an authentication center, thereby reducing the risk that the signature tracks the vehicle-mounted unit and realizing the anonymity of communication messages. Re-signature keys are dispersed to a plurality of roadside communication units in a threshold mode for management, thereby reducing the decoding success rate of the re-signature keys and preventing the roadside communication units from abusing the proxy signature right. The authentication center traces a real vehicle releasing a false message to solve the problem of calling back illegal vehicles. The protocol has relatively high security and a relatively low storage cost, has unforgeability, robustness, message authentication, replay attack resistance and traceability, and can greatly improve the privacy of network member information.

Description

technical field [0001] The invention relates to a vehicle network message authentication protocol, which can be applied to the technical fields of privacy protection such as wireless VANET, sensor network, ad hoc network and wireless communication. Background technique [0002] Vehicle Ad hoc Network (VANET), also known as self-organizing traffic information system, is a fast mobile outdoor communication network. Vehicle ad hoc network is a mobile network designed to facilitate mutual communication between vehicles under the background of intelligent transportation. The nodes in the network are mainly composed of three parts, the on-board unit (OBU) installed on the vehicle, Roadside Units (Road-side Units, RSUs) deployed on both sides of the road or at intersections and Trusted Authorities (TAs) responsible for managing all OBUs and RSUs. The vehicle ad hoc network allows communication between OBUs or between OBUs and RSUs through a short-distance wireless communication (D...

AI Technical Summary

Problems solved by technology

However, this scheme relies on the reliability of the RSU. If the RSU is dishonest or is maliciously attacked and controlled by an attacker, it will lead to serious consequences such as disclosure of private information and loss of keys.

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