Cross-domain identity-based broadcasting encryption method in space information network

Abstract

The invention discloses a cross-domain identity-based broadcasting encryption method in space information network. The implementation method includes 1, performing system safety initialization; 2, performing broadcasting encryption on transmission information in a source-end safety domain; 3, judging whether a source end safety domain agent belongs to a receiving user or not; 4, performing broadcasting encryption on transmission information in an agent safety domain; 5, judging whether a target safety domain belongs to a receiving user or not; 6, performing broadcasting encryption on transmission information in the target safety domain; 7, completing the operation and quitting. According to the invention, under the premise that the safety domain uses the identify-based broadcasting encryption, the cross-domain broadcasting encryption is performed on information transmission in three phases of the source end safety domain, the agent safety domain and the target safety domain, so that a sending party does not need to be involved in a safety mechanism in a domain with a receiving path and information transmission among different domains is realized further. The method can be applied to technical fields such as space information networks and the like.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and further relates to a cross-domain identity-based broadcast encryption method in a spatial information network in the technical field of network security. Based on the identity-based broadcast encryption system, the present invention proposes a secure transmission method that can be used in a space information network to realize that receiving users can be distributed between multiple security domains and perform broadcast encryption on each other. Background technique [0002] With the rapid development of aerospace technology, my country's space information network is also constantly being built and improved. The space information network is a network information system composed of spacecraft with space communication capabilities, such as satellites, space shuttles, etc., and ground stations. It can realize the interconnection and intercommunication functions between ground st...

AI Technical Summary

Problems solved by technology

The shortcomings of this method are: First, although the fixed-length ciphertext constructed by this scheme is conducive to the rapid transmission of information, the size of its public parameters will increase linearly with the increase of the total number of users in the system

The shortcomings of this method are: firstly, the public parameters of users are linearly related to the total number of system users. When the number of system users is too large, it will inevitably affect the performance of the broadcast encryption scheme.

Secondly, the construction process of this scheme only considers the broadcast encryption process in the same security domain, and it cannot be directly used in the broadcast encryption in the space information network

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