Ticket-based access layer handover authentication method for LTE-R vehicle-ground communication

Abstract

A kind of LTE-R vehicle-ground communication access layer switching authentication method based on ticket, its step mainly is: A, apply for ticket: vehicle-mounted mobile unit applies for and preserves target ticket and target base station ticket; B, X2 interface handover authentication: vehicle-mounted The mobile unit uses the target base station ticket to complete the authentication and key negotiation process with the target base station safely and efficiently, realizing fast handover across base stations and avoiding the participation of the source base station; The management entity completes the authentication process safely and efficiently, and completes the authentication and key negotiation process with the target base station with its help, avoiding the participation of the source mobile management entity and the source base station, and quickly realizing handover across mobile management entities; this method effectively realizes In the LTE-R system, the secure real-time access layer handover authentication of vehicle-ground wireless communication improves the efficiency of handover authentication on the basis of ensuring security.

Description

technical field [0001] The invention relates to a handover authentication method of a wireless communication access layer of a railway system, in particular to a note-based LTE-R vehicle-ground communication access layer handover authentication method. Background technique [0002] In 2009, UIC (International Union of Railways) has clearly adopted LTE-R (Long Term Evolution for Railway) as the wireless communication technology for the new generation railway system. LTE-R follows the basic structure of SAE / LTE, adopts an all-IP flat network architecture, has the characteristics of high data transmission rate, low access delay and multi-network compatibility, but also inherits the inherent security defects of the Internet network, and In the transitional stage, multi-network coexistence, wireless interfaces and core network segments are unprecedentedly open, all of which bring more security challenges to the LTE-R system. [0003] Entities related to access layer authenticati...

AI Technical Summary

Problems solved by technology

[0004] The standard method (protocol) of LTE access layer handover authentication mainly adopts the hash chain technology, which is completely based on the symmetric cryptosystem. Although its computational complexity is low, the number of information interactions is large and the communication delay is high.

Moreover, due to the one-way nature of the hash function, after the current session key is leaked, the next round of session keys will also be leaked, that is, the session key lacks backward security

In addition, the synchronization parameters transmitted by the base station and the vehicle-mounted mobile unit during the authentication process are not protected by confidentiality and are easy to be tampered with. Therefore, it is difficult to resist desynchronization attacks; finally, because each information message lacks the freshness of time stamp protection, therefore, Vulnerable to replay attacks