Privacy protection batch authentication method without pairing operation in vehicular ad hoc network

Abstract

The invention provides a privacy protection batch authentication method without a pairing operation in a vehicular ad hoc network. The privacy protection batch authentication method comprises the following steps: S1, establishing a system parameter by a credible mechanism in the vehicular ad hoc network, generating a system master key, and broadcasting the system master key to a roadside unit and all vehicles, and generating a real identity and a corresponding password for each vehicle by the credible mechanism, and storing the real identity and the corresponding password in each vehicle together with the system parameter; S2, verifying the real identity and the password of the vehicle which is about to broadcast a message, and establishing a corresponding virtual identity after passing the verification; S3, signing the message to be broadcasted by the vehicle through the established virtual identity, and broadcasting the signed message to the roadside unit and other vehicles; and S4, verifying the broadcasted message in one or more modes by the roadside unit and other vehicles, and accepting the broadcasted message after the verification is passed. According to the privacy protection batch authentication method provided by the invention, no pairing operation is needed in the message signature or verification, and the three problems of security, privacy protection and authentication efficiency in the vehicular ad hoc network can be solved at the same time.

Description

technical field [0001] The invention relates to a privacy protection batch authentication method in a vehicular ad hoc network, specifically a privacy protection batch authentication method in a vehicular ad hoc network that does not require pairing operations, and belongs to the field of vehicular network communication security. Background technique [0002] The vehicle ad hoc network is a wireless ad hoc network applied to vehicle communication. Vehicles can obtain real-time traffic information from the vehicle ad hoc network; such as: the current traffic flow, traffic accidents, and the speed, location, and Orientation, etc., and select the best route accordingly to effectively alleviate road traffic congestion and minimize or avoid traffic accidents, thereby improving road traffic efficiency. Therefore, vehicular ad hoc network is one of the most promising applications in the field of transportation. [0003] However, due to the openness of the wireless network itself, ...

AI Technical Summary

Problems solved by technology

[0005] However, the technical scheme proposed by Tzeng and other scholars uses the two most time-consuming pairing operations in the actual operation process. From their experimental results, it can be seen that the pairing operation is one of the most complicated operations, and the amount of calculation is far less than that of There are many dot multiplication operations, which greatly reduces the computational efficiency of this technical solution

In addition, the hiding of the real identity information in this scheme uses a dot product operation, which further reduces the computational efficiency of the scheme

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