Research On Network Model Based On Quantum Key

The arithmetic security of classical cryptography mechanism is mainly calculational security. Quantum cryptography is a new cryptography mechanism that is based on quantum dynam and cryptogram and realized with the physics methods. Because quantum cryptography system is a physics system, it allows two-parts or multi-parts to establish the shared key through public channel without shared secret information. Its security is based on quantum dynam basic principle such as Heisenberg uncertainty principle and quantum unclone mechanics, etc. It guarantees eavesdropper cannot wiretap or get information without destroying the system quantum states. So we can realize the secrecy unconditionally in a public way.Quantum cryptography protocol is the base of quantum cryptography, so firstly, quantum cryptography protocol is improved in the paper. The classical quantum key distribution process is expanded to seven steps, which is described mainly in error-elimination, estimation information obtained by eavesdropper like Eve and privacy enhancement. Meanwhile the charts are given accordingly to consummate the whole process from identity authentication to the last transmission of encrypted message.Secondly, based upon the analysis of the existing Multiple-Access Star-Model(MASM) quantum network, Multiple-Access Control-Bus(MACB) quantum network and the Geneva group experimental scheme that based upon Faraday mirror, a loop-type quantum key network based on Sagnac loop is proposed. The principle of Sagnac loop is introduced. The network mainly utilizes the Sagnac effect using the mature BB84 protocol to realize the three-to-one link structure. At the same time,security and efficiency of the topology are analyzed in the paper.Finally, a new quantum identity authentication design scheme is proposed in this paper. Different from the basic shared-information identity authentication and shared-entanglement identity authentication, the scheme combines quantum entangle state and classical cryptography to realize the digital identification card. Then material data, experimental analysis, security analysis and efficiency conclusion are given. Meanwhile the future development of quantum identity authentication is given in the paper. It emphasizes that we should make use of the physical characteristics of quantum fully to solve noise and unlawful inbreak problems.