Mobile secret communication method based on quantum key distribution network

Abstract

The invention discloses a mobile secret communication method based on a quantum key distribution network. The method includes the steps that a mobile terminal registers to have access to the network, and the binding relationship between the mobile terminal and some centralized control station in the quantum key distribution network is built; after communication service is started, the mobile terminal participating in the communication applies for a service key from the quantum key distribution network; the quantum key distribution network obtains the addresses of all centralized control stations participating in service key distribution in the communication, and a service key generation centralized control station is assigned according to the current state indicators of all the centralized control stations; the service key generation centralized control station generates the service key needed by the communication and distributes the service key to the mobile terminal participating in the communication; the mobile terminal participating in the communication uses the service key, and secret communication is performed through the original data link of the communication service of the class. According to the method, the existing scheme in the industry is improved in the service key generation link and the key relay link, and the problem that when there are lots of relay nodes, key arrival lags behind, and the quality of service is influenced is solved.

Description

technical field [0001] The invention belongs to the field of mobile communication encryption, in particular to a mobile security communication method based on a quantum key distribution network. Background technique [0002] The modern cryptography system is mainly based on the one-way calculation, and its security can only be guaranteed by experience; the future quantum computer will make it possible to quickly decompose the prime factor algorithm, so that the foundation of the existing cryptography system will no longer exist. Quantum key distribution technology is a new type of communication encryption method that has emerged in recent years. It uses quantum state encoding information at the single photon level, and can distribute arbitrary lengths between quantum signal transmitters and quantum signal receivers located in two places. A string of identical random numbers, that is, both parties can share a large number of random keys. These random keys can be used to encr...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the characteristics of quantum keys, the generation of shared quantum keys between the two places is currently limited by distance. Therefore, if you want to build a quantum key distribution network with a certain physical coverage, you need to join new A trusted relay device that relays the actual communication service key

However, in some communication services that require high real-time performance, even if the key relay type mobile confidential communication is adopted, it may also face problems in the generation and relay of service keys due to the number of concurrent calls and too many relay nodes. The process takes a long time, which leads to the problem of key arrival lag and affects the quality of service

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