LTE-R network group authentication key agreement method without certificate aggregate signature

Abstract

A kind of LTE-R network group authentication key negotiation method without certificate aggregation signature, its main operation steps are: A, system establishment and participant registration: the entity participating in authentication completes registration at the key generation center, and obtains public and private keys Information; B. Initial access authentication: when the user equipment is uniformly connected to the LTE-R network before the train departs, it executes a certificate-free signature algorithm to generate its own signature and sends it to the relay server, and the relay server executes the certificate-free aggregate signature algorithm. Realize rapid mutual authentication and negotiation of shared keys between user equipment, relay server and roadside base station; C. Handover authentication: During train operation, user equipment always maintains a stable connection with The roadside base station realizes fast and frequent switching authentication by implementing the certificateless signature algorithm; D. Terminate the session. The method has high authentication efficiency, small signaling overhead and good security.

Description

technical field [0001] The present invention relates to an LTE-R network group authentication key negotiation method, in particular to an LTE-R network group authentication key negotiation method without a certificate aggregated signature. Background technique [0002] The core goal of LTE-R (next-generation railway communication system) is to provide high-quality communication and network services to passengers, which are not related to train operation control and non-critical communication services. However, the mobile communication in the high-speed railway environment faces the problems of instantaneous access to the network by a large-scale passenger group and signaling congestion caused by frequent handovers, which seriously affects the user's communication and network service experience. [0003] The traditional LTE-R network architecture consists of two parts, the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and the Evolved Packet Core (EPC). The Evo...

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Problems solved by technology

[0005] (1) Communication switching authentication scenarios are complex

According to the above analysis, there are three situations when the user equipment (UE) performs communication handover authentication, and in the three cases, the authentication method, the parameters to be transmitted and the method of generating the key are not the same, and there is a lack of a unified handover authentication standard

[0006] (2) The remote authentication vector increases the communication delay

Since the EPS-AKA protocol uses a challenge-response authentication method based on a symmetric cryptosystem, the Mobility Management Entity (MME) needs to remotely request an authentication vector from the Home Subscriber Server (HSS) when authenticating the User Equipment (UE). In order to achieve mutual authentication between user equipment and the network, this method increases the consumption of communication bandwidth, and, in the LTE-R network, passenger users are in a high-speed mobile state, and frequent communication switching authentication is required, which will increase the consumption of authentication vectors , increasing the communication delay

[0007] (3) In the case of high-speed mobility, large-scale user group access authentication and frequent switching authentication are likely to cause signaling congestion

The EPS-AKA standard protocol is designed for single user equipment (UE) access network authentication and communication handover authentication. However, in the LTE-R network environment, passenger users are moving at high speed, and the number of users is large. Instantaneous communication switching authentication between base stations is prone to authentication signaling congestion, which affects user communication and network service experience

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