A mobile secure communication method based on quantum key distribution network

Abstract

Disclosed is a mobile secret communications method based on a quantum key distribution network, comprising the following steps: a mobile terminal registering to access the network and establishing a binding relationship with a certain centralized control station in the quantum key distribution network; after a communication service is initiated, the mobile terminals participating in the current communication applying for service keys from the quantum key distribution network; the quantum key distribution network obtaining addresses of the centralized control stations participating in service key distribution during the current communication, designating a service key generation centralized control station according to a current state indicator of each centralized control station; the service key generation centralized control station generating service keys required in the current communication and distributing the keys to the mobile terminals participating in the current communication; the mobile terminals participating in the current communication using the service keys and performing secret communication through an original data link of such a communication service. The present invention makes improvement to the existing solution of a service key generation phase and a key relay phase, and solves the problem that the service quality is affected when there are a large number of relay nodes and after the arrival of the key lags.

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

Images