Data encryption method for use in satellite-ground communication system

Abstract

The embodiment of the invention provides a data encryption method for use in a satellite-ground communication system. The method comprises the following steps: determining an authentication parametertuple according to an access request sent by a first terminal, transmitting the authentication parameter tuple to a first access point in a data transmission path of the first terminal in order that the first access point performs bidirectional authentication on the first terminal according to the authentication parameter tuple, and negotiating a first session key with the first terminal when thebidirectional authentication is successful; and generating a first encrypted random number and transmitting the first encrypted random number to the first terminal in order that the first access pointnegotiates a second session key with a second access point in the data transmission path according to the first access point. According to the method provided by the embodiment of the invention, datatransmitted in an access network area and a backbone network area respectively are encrypted by different encryption methods, thereby realizing the whole process encrypted transmission of data, and ensuring the security of a space-ground integrated network.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of network security, in particular to a data encryption method in a satellite-to-earth communication system. Background technique [0002] The space-ground integrated network follows the idea of ​​"space-based networking, ground-network cross-generation, space-ground interconnection", overall planning, focusing on the construction of space-based information networks, independent innovation, typical demonstration of the future Internet, collaborative docking, and active application of special achievements in mobile communications. Realize the integrated development of space-based information network, future Internet, and mobile communication network, and form a cyberspace with interconnection of everything, human-computer interaction, and integration of heaven and earth. In this space, the boundaries between networks and systems are becoming increasingly blurred, and it is difficult ...

AI Technical Summary

Problems solved by technology

The space-ground integrated network is one of the supporting technologies for the construction of cyberspace. The complex topology, high heterogeneity, and diversified entity types of the space-ground integrated network make the traditional password application model unable to completely solve new security problems. , systematically exert the overall guarantee effectiveness of ciphers in the security of the space-ground integration network, so as to realize the encryption of the data transmitted in the space-ground integration network

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