Semi-quantum dialogue method without classical correspondent with measurement capability based on single photons

Abstract

The invention provides a semi-quantum dialogue method without a classical correspondent with the measurement capability based on single photons. Bidirectional communication between one quantum correspondent and one classical correspondent is achieved. The active-attack security of external Eve is guaranteed through scrambling operation of the classical correspondent, the complete robustness of an existing semi-quantum key distribution method and classical one-time-padding encryption. Through classical base measurement of every two adjacent information single photons of the quantum correspondent, the initial states of the quantum correspondent and the classical correspondent are shared by the quantum correspondent and the classical correspondent, and therefore the information leakage problem can be solved with the semi-quantum dialogue method. Compared with a traditional information-leakage-free quantum dialogue method, the semi-quantum dialogue method has the advantage that only one correspondent has the quantum capacity. Compared with an existing semi-quantum dialogue method, the semi-quantum dialogue method has the advantages that the single-photon entangled state but not two-photon entangled states is used as a quantum carrier, and has the good practical performability.

Description

technical field [0001] The invention relates to the field of quantum cryptography. The present invention designs a semi-quantum dialogue method based on single photons that does not require a classical communicator to have measurement capabilities, and realizes two-way communication between a quantum communicator and a classical communicator. Background technique [0002] Quantum cryptography, born from the forward-looking quantum key distribution (Quantum key distribution, QKD) method [1] proposed by Bennett and Brassard in 1984, uses the properties of quantum mechanics rather than the computational complexity of mathematical problems to achieve unconditional security . Quantum cryptography has attracted a lot of attention and established many interesting branches, such as QKD [1-5], Quantum secure direct communication (Quantum secure direct communication, QSDC) [6-13], Quantum secret sharing (Quantum secret sharing, QSS )[14-18] and so on. [0003] QKD focuses on using ...

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Problems solved by technology

However, this requirement may be impractical since not both communicators can afford expensive quantum resources and operations

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