Information theoretical security-based key agreement method in satellite network

Abstract

The invention discloses an information theoretical security-based key agreement method in a satellite network, which can be used for key agreement in the satellite network and belongs to the technical field of wireless network communication. The agreement method comprises the following steps of: introducing information theoretical security into the satellite network and establishing an agreement protocol according to the characteristics of the satellite network; and in the agreement protocol, two legal communication parties are communicated with each other on a pair of independent discrete memoryless channels in the satellite network, priority extraction and information agreement are finished through a two-stage code communication scheme in which only two cycles of communication are used,privacy enhancement is finished through a universal hashing technique, and finally the two parties acquire an information theoretical security-based shared key. In the method, the characteristics of long delay and asymmetric channels in the satellite network are considered, so that the information theoretical security-based key agreement can be realized, and the shared key of the two communication parties in the satellite network can be unconditionally secure.

Description

technical field [0001] The present invention generally relates to the technical field of wireless network communication, and in particular relates to a key negotiation method based on information theory security in a satellite network. Background technique [0002] Traditional cryptography such as the encryption systems DES and AES using symmetric keys and the encryption system PKI using public key mechanisms are all based on complexity theory, using the viewpoint and method of complexity theory to study the establishment of cryptographic system models and the analysis of cryptographic security. and deciphering etc. The security standard established by traditional cryptography is the conditional security of cryptographic systems, that is, when discussing the security of traditional encryption systems, a certain timeliness and the computing power and resources of the enemy must always be taken into account. If the attacker uses the current The best known method to attack an ...

AI Technical Summary

Problems solved by technology

[0005] 2. The security of traditional cryptography cannot be proven in theory, which leads to the need to define additional security levels when discussing security

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