Access and switching authentication method and system in satellite network intermittent connection scene

Abstract

The invention belongs to the technical field of network security communication, and discloses an access and switching authentication method and system in a satellite network interrupted connection scene. The access and switching authentication method has the advantages that: simple hash and XOR operations are used for operation, and meanwhile, a terminal is guaranteed to be safely accessed to a satellite network through using a timestamp, a message authentication code, a random number and RES, and bidirectional authentication is realized while the communication overhead and the calculation overhead are reduced; based on a current session key of a mobile user UE and a satellite network, rapid communication recovery authentication after the UE and the satellite network are disconnected is realized, the unnecessary access authentication frequency is reduced, and the burden of the system is reduced; safe switching is achieved through utilizing random numbers and hash functions, and safe switching is achieved while the communication cost in the satellite switching process is reduced; and the user achieves anonymity by generating a temporary identity, and each successful authentication is refreshed for the next authentication.

Description

technical field [0001] The invention belongs to the technical field of network security communication, and in particular relates to a method and system for terminal access authentication and seamless handover authentication suitable for satellite network intermittent connection scenarios. Background technique [0002] In order to achieve global network coverage, 3GPP and other international organizations have listed satellite networks as one of the 5G access methods. The Ministry of Science and Technology of my country has also launched the research and development of satellite communication and ground mobile communication fusion technology in 2019. The satellite network will be based on the ground-based network, combined with the characteristics of the satellite network such as wide communication coverage and efficient broadcasting, so that the air, sea and ground can be connected and interconnected to achieve full coverage on a global scale. The satellite network composed ...

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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