Vehicle-mounted network anonymous authentication system and method based on ring signature and vehicle communication platform

Abstract

The invention belongs to the technical field of vehicle communication security, and discloses a vehicle-mounted network anonymous authentication system and method based on a ring signature, and a vehicle communication platform. The trust mechanism and the vehicle with the OBU are registered to generate a part of private keys; A vehicle of the OBU is registered and preloaded with public system parameters and corresponding public and private keys before being added into the vehicle-mounted ad hoc network. When the vehicle runs on a road, related state information is periodically broadcasted after safety certification; And when the signer finds that the signer anonymously leaks the false message or the behavior that the signer is damaged, the trust mechanism uncovers the real identity of thesender. According to the invention, the certificateless public key cryptosystem and the ring signature are combined to form the certificateless ring signature, so that anonymity and unforgeability aremet, and meanwhile, security authentication is met; A traceable algorithm is formed by adding related information to effectively solve the problem that when a signer anonymity leaks false messages orother destructive behaviors, identity tracking and revocation are carried out according to the received messages.

Description

technical field [0001] The invention belongs to the technical field of vehicle communication security, and in particular relates to a ring signature-based vehicle network anonymous authentication system and method, and a vehicle communication platform. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: in order to reduce traffic accidents, improve traffic conditions, and provide users with corresponding network services, VANET (vehicle network) is gradually emerging, which is a fusion of direct interconnection between vehicles , indirect interconnection, and the hybrid system structure network of interconnection between vehicles and roadside fixed facilities, which can realize vehicle-to-vehicle (Vehicle to Vehicle, V2V) and vehicle-to-roadside infrastructure (Vehicle to Infrastructure, V2I) The multi-hop wireless communication provides vehicles with a variety of safety applications (such as accident warning, tra...

AI Technical Summary

Problems solved by technology

Aiming at the privacy protection problems that arise, prior art 1 proposes a group signature-based privacy protection authentication scheme for the Internet of Vehicles, which can meet the requirements of anonymity and traceability, but requires the assistance of RSU and the problem of certificate storage; some The scheme adopts the conditional ring signature method. The existing technology 2 proposes a privacy protection communication scheme using the conditional anonymous ring signature in the Internet of Vehicles, which does not require the participation of the group manager, but there is a problem of certificate storage and revocation; the existing technology 3 proposes a An anonymous communication framework based on a pseudonym in the Internet of Vehicles environment. This framework includes several processes such as pseudonym generation, distribution, and regeneration, and uses a distributed optimization algorithm to change the pseudonym. However, the pseudonym method needs to constantly change the pseudonym , modifying the pseudonym at an inappropriate time period or location will cause the scheme to be invalid

At the same time, prior art 4 proposes a certificate-based anonymous authentication scheme for the Internet of Vehicles, which can satisfy conditional identity tracking and has high computing efficiency, but there are problems in certificate distribution, revocation and storage of a large number of certificates in this method; Prior Art 5 proposes a threshold anonymous authentication protocol for VANET, which achieves the goal of conditional privacy and traceability by using the threshold group signature method, but the group signature method requires the participation of the group manager in the authentication process, which will lead to power is too big

It can be seen that in the existing anonymous authentication schemes for in-vehicle networks, when meeting the requirements of anonymity and unforgeability, they cannot meet the requirements of tracking the identity when the receiver is found to forge messages; some of them meet the basic security requirements. However, it cannot meet the requirements of vehicles moving at any time and spontaneously forming a ring at any time in the vehicle network environment; even the use of an identity-based ring signature scheme will cause the problem of key custody, so that a trusted third party knows the private key of each member, which will cause unnecessary An honest third party forges any member's signature, reducing security

Therefore, the existing methods cannot simultaneously meet the target requirements of spontaneity, efficiency, anonymity, unforgeability and traceability

[0003] To sum up, the problem existing in the existing technology is: in the existing vehicle network anonymous authentication scheme, usually when meeting the requirements of anonymity and unforgeability, it cannot meet the requirement of tracking the identity when the receiver is found to forge the message ; Some meet the basic security requirements, but they cannot meet the requirements of vehicles moving at any time and spontaneously forming rings in the vehicular network environment; even the use of identity-based ring signature schemes will cause key escrow problems, so that trusted third parties know each member's private key, causing a dishonest third party to forge any member's signature, reducing security

For example, a modification and replay attack on it using a previously propagated message could be fatal to some users

Images