Message authentication and group key negotiation method based on vehicle-mounted short distance communication network

Abstract

The invention discloses a message authentication and group key negotiation method based on a vehicle-mounted short distance communication network, comprising steps of utilizing a road side node arranged at a crossroad to detect the state of a signal lamp, constituting vehicles having same geographic position information and same driving directions into a cluster during the red light, performing verification on the vehicle-mounted node in the cluster through a certificate authorization center, and distributing a secret key to the vehicle-mounted node passing through the verification, wherein the vehicle-mounted node in the cluster utilizes the distributed secret key to generate a group code through a cluster code negotiation process and thus utilizes the group code to realize the confidential communication between the vehicle-mounted nodes. The message authentication and group key negotiation method utilizes the V2X network characteristics, like the characteristics of the road side node, that the vehicle-mounted node is in the halted state when the red light is on and the status of all vehicle-mounted nodes are equal, realizes the information verification of the vehicle-mounted nodes and the cluster secret key negotiation process in the V2X network, and improves the safety of the V2X network.

Description

technical field [0001] The invention relates to a method for message authentication and group key negotiation 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 vehicles as the core node, V2X has the characteristics of rapid change in topology structure, especially the opening of its communication medium leads to poor channel security, and is more vulnerable to attacks than traditional networks. At the same time, since V2X is the core of the future intelligent transportation system (ITS), it involves high-security applic...

AI Technical Summary

Problems solved by technology

The application of message authentication technology in the V2X network can realize secure communication between vehicle nodes. Before message authentication, the keys must be distributed to each vehicle node. leaking the key

[0005] The problem of key distribution can be solved by using the group key agreement method. However, due to the characteristics of the V2X network, such as the vehicle is in a constantly changing state, the relative position of the vehicle nodes is unstable, and the time to pass the roadside nodes is very short. , implementing message authentication and group key agreement in V2X networks is still facing great challenges

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