Vehicle node certificate updating method based on Vehicle to X (V2X) network

Abstract

The invention discloses a vehicle node certificate updating method based on a Vehicle to X (V2X) network. A vehicle node applies for an updated certificate from a PKI (Public Key Infrastructure) system via a roadside node; the PKI system sends part of private keys to the vehicle node; the vehicle node generates a new public key and a new private key using the part of private keys and part of private keys generated per se, generates a certificate using the new private key, and sends the certificate to the PKI system; the PKI system verifies the validity and the accuracy of the certificate; and after the certificate passes the verification, the PKI system updates the certificate of the vehicle node using the public key generated by the vehicle node, and issues the updated certificate to the whole network. The updated certificate, the new public key and the new private key are all generated using part of private keys of the PKI system and part of private keys of the vehicle node, and only the vehicle node has node private keys, so the information issued by the vehicle node can be effectively prevented from being decrypted by the PKI system, and the security and the non-repudiation of communication of the vehicle node in the V2X network are guaranteed.

Description

technical field [0001] The invention relates to a method for updating a vehicle-mounted node certificate based on a vehicle-mounted short-distance communication network, and belongs to the technical field of vehicle-mounted communication networks. Background technique [0002] The vehicle short-distance communication (VehicletoX: V2X) network is realized by short-distance communication technologies such as wireless communication, GPS / GIS, and sensors. 2-Vehicle), outside the vehicle (vehicle-2-Infrastructure), and between vehicles (Vehicle-2-Person). [0003] As a wireless mobile network with constantly moving cars as the core node, V2X has the characteristics of rapid topology changes, especially the openness of its communication media leads to poor channel security, and is more vulnerable to attacks than traditional networks. At the same time, since the V2X network is the core of the future intelligent transportation system (ITS), it involves high-security applications su...

AI Technical Summary

Problems solved by technology

[0005] However, the PKI security system in the above-mentioned V2X network still has certain risks. This is because PKI has the private keys of all vehicle nodes, and it can decrypt the messages sent by all vehicle nodes, which affects the communication reliability of vehicle nodes, The non-repudiation of messages published by vehicle nodes poses certain threats

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