Access and handover authentication method and system in satellite network intermittent connection scenario

Abstract

The invention belongs to the technical field of network security communication, and discloses an access and handover authentication method and system under the intermittent connection scenario of a satellite network. Simple hash and XOR operations are used to perform operations, and at the same time, time stamps, message authentication codes, random numbers and RES are used to ensure that terminals are securely connected to the satellite network, which realizes two-way authentication while reducing communication overhead and computing overhead; based on The current session key of the mobile user UE and the satellite network realizes the rapid communication recovery authentication after the UE is disconnected from the satellite network, reducing the unnecessary access authentication times and reducing the burden on the system; through random numbers and hashes The function realizes safe handover, which reduces the communication cost during the satellite handover process and also realizes safe handover; the user achieves anonymity by generating a temporary identity, and each successful authentication will be refreshed for the next authentication.

Description

Technical field [0001] The present invention belongs to the field of network security communication technology, and more particularly to terminal access authentication and seamless switching authentication methods and systems that are adapted to satellite interruption. Background technique [0002] In order to realize network coverage, international organizations such as 3GPP have listed satellite networks as one of 5G access methods. The Ministry of Science and Technology has launched research and development of satellite communication and ground mobile communication fusion technology in 2019. Satellite network will be based on the foundation network, combined with the communication coverage of the satellite network, high-efficiency broadcast, etc., to connect the air, the ocean and the ground, and achieve full coverage in a global scale. Satellite network consisting of a variety of heterogeneous networks contains a variety of network nodes, providing emergency protection, Tianj...

AI Technical Summary

Problems solved by technology

[0005] (1) Most of the existing technical solutions do not consider the security issues of interruption and reconnection between the user and the satellite network caused by the unstable link of the satellite network, which makes the terminal perform multiple unnecessary access authentications and wastes communication resources

[0006] (2) Most of the existing access authentication and handover authentication schemes are studied separately, and most of the handover authentication schemes have security and performance related problems, and few use low-overhead cryptographic techniques to achieve secure handover authentication, making the authentication schemes unable to meet Performance requirements in most practical satellite network scenarios

[0007] (3) In the current satellite network authentication scheme and research on user anonymous access authentication, the traditionally used public key cryptosystem not only creates a huge burden on the satellite system due to its excessive calculation overhead and password update overhead and fail to meet the security requirements of the device

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