Location Privacy Preservation Method for Internet of Vehicles Based on Pseudonym Exchange

Abstract

The invention discloses a position privacy protection method of the Internet of Vehicles based on pseudonym exchange. Existing methods have high communication overhead and cannot defend against semantic-based pseudonym association attacks. The method of the present invention can effectively protect the location privacy of the vehicle by using the beacon information and the change law of the vehicle's position and speed. The specific process is: the vehicle searches for the target vehicle, requests the public key of the target vehicle from the RSU, and then negotiates with the target vehicle to achieve pseudonym exchange Agreed, and finally cooperate with each other to complete the pseudonym exchange. Finding the target vehicle is done using the pre-defined overtaking conditions to ensure that the vehicle can broadcast false beacon information for a short period of time to achieve a smooth transition of the state and prevent attackers from performing pseudonym association through semantics. The method of the invention is simple in operation and easy to implement; it only needs to communicate with the target vehicle, reducing the communication overhead; by temporarily broadcasting false beacon information, it can effectively resist pseudonym association attacks and reduce the impact on security applications.

Description

technical field [0001] The invention belongs to the technical field of the Internet of Vehicles, relates to a privacy protection technology based on a location service, and in particular relates to a method for protecting the location privacy of the Internet of Vehicles based on a pseudonym exchange. Background technique [0002] There are vehicles, Road-Side Units (RSUs) and Certificate Authorities (CAs) in the Internet of Vehicles. Vehicles broadcast beacon information periodically, so that other vehicles can understand the state of the entire network and take corresponding measures to avoid traffic congestion and accidents. The beacon information includes the state information of the vehicle, and the vehicle broadcasts the beacon information in plaintext every 100ms to 1s. When the vehicle is driving on the road, it can only drive in a certain direction along the road under the premise of complying with the relevant traffic laws, and the trajectory is predictable. The a...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the communication cost is too high and the location privacy cannot be effectively protected in the existing method, and to provide a method for protecting the location privacy of the Internet of Vehicles based on pseudonym exchange, which can effectively protect the location privacy of the vehicle

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