A group key management method for low-orbit satellite networks

Abstract

The invention discloses a group key management method for a low-orbit satellite network, and aims to solve the problem of large storage and communication costs in the traditional group key management method, and at the same time ensure the confidentiality and security of communication in the low-orbit satellite network sex. The technical solution is to build first by PKG, satellite LEO A , Satellite LEO B and ground terminal TE A The group key management system oriented to the low-orbit satellite network is formed. By designing the identity-based signature and the one-way function tree, after initializing the group key management system, the group member registration, group key generation, Group member joining, group member exiting and group controller switching to achieve group key generation, distribution and update maintenance. The invention can provide confidentiality service, guarantee forward security and backward security, and has small storage overhead and communication overhead.

Description

technical field [0001] The invention relates to the technical field of network security, in particular to a group key management method for low-orbit satellite networks. Background technique [0002] The low-orbit satellite network can be used for military target detection, mobile phone communication and other functions. It is currently the most promising satellite mobile communication system. In the low-orbit satellite network, the satellite needs to realize point-to-multipoint communication, that is, multicast technology. Multicast allows group members to join or leave freely, and requires that only group members can receive the communication content in the group. However, if no security measures are taken, the communication information will face security risks such as eavesdropping, tampering, and replay. In order to protect the confidentiality and security of information, it is necessary to introduce confidentiality measures, and introduce a shared key in the talk grou...

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is to propose a group key management method for low-orbit satellite networks, combined with identity-based cryptography technology and one-way function tree, to solve the problem of large storage and communication costs in traditional group key management methods problems while ensuring the confidentiality and security of communications in LEO satellite networks

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