Quanta identity authentication system based on phase modulation

Abstract

It is a quanta identification system based on phase modulation, which comprises identification center and user terminal. The semi-single photo generated by laser and attenuator is sent to user terminal through first optics fiber arm and the beam is transmitted to the beam-integration through user identification card and phase modulator. The beam through second optics fiber is sent to phase modulator after time lag to achieve the beam-integration. The user main controller controls the phase modulator according to user code and the two main controllers communicate through classic channel with clock in-step generator providing clock signals. The random number generator generates the needed random number and the user database stores user identification information.

Description

technical field [0001] The invention relates to a quantum identity authentication system based on phase modulation, which solves the problem of user identity authentication in the field of information security, and is a frontier topic combining multiple disciplines such as cryptography, optical fiber communication, quantum optics, nonlinear optics and network communication . Background technique [0002] Quantum cryptography is a new cryptographic system based on classical cryptography and quantum physics. The security of this cryptographic system is guaranteed by the inherent property of qubits (Heisenberg uncertainty). The quantum no-cloning theorem and Heisenberg's uncertainty principle guarantee that quantum cryptography has unconditional security and detectability against eavesdropping, making quantum cryptography have good performance and prospects. [0003] In 1969, S. Wiesner first proposed the idea of ​​quantum cryptography. In 1984, C.H.Bennett, a scientist of IB...

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