Information leakage-free bidirectional quantum secure direct communication protocol based on any two gigahertz (GHZ) state/entanglement exchange result collection codes

Abstract

At present, information leakage is a serious security threat to bidirectional quantum secure direct communication (BQSDC). The invention provides an information leakage-free bidirectional quantum secure direct communication protocol based on any two gigahertz (GHZ) state / entanglement exchange result collection codes. In the information leakage-free bidirectional quantum secure direct communication protocol, two remote legitimate communication sides, namely, Alice and Bob can exchange their respective secret information without concern on information disclosure required. According to the protocol, a shared secret gigahertz (GHZ) state is utilized to overcome the problem of information disclosure. The shared secret gigahertz (GHZ) state has the following functions in a bidirectional communication process that: on the one hand, the shared secret gigahertz (GHZ) state makes Bob known a configured initial state, and on the other hand, the shared secret gigahertz (GHZ) state can be used by Bob so that Bob can encode secret information; and further, the protocol can transmit six-bit secret information per communication round. Compared with an existing BQSDC protocol, the protocol of the invention has the following advantages that: the protocol can overcome the problem of information disclosure; and on the other hand, the capacity of the protocol can achieve six bit per communication round.

Description

technical field [0001] The invention relates to the field of quantum security communication. The present invention designs a bidirectional quantum secure direct communication (Bidirectional Quantum Secure Direct Communication, BQSDC) protocol based on the set encoding of any two GHZ state entanglement exchange results without information leakage, so that both parties in long-distance legal communication can safely exchange their mutual secret information There is no need to worry about information leakage. Background technique [0002] Quantum communication has become one of the most important applications of quantum mechanics and has attracted a lot of attention. As a branch of quantum communication, Quantum Key Distribution (Quantum Key Distribution, QKD) is committed to establishing an unconditionally secure shared key between two parties in long-distance legal communication. Since the first QKD was proposed by Bennett and Brassard [1] in 1984, many good QKD protocols [...

AI Technical Summary

Problems solved by technology

As analyzed above, it can be concluded that since a large number of BQSDC protocols [15-16, 18-26, 30, 35] have information leakage problems, information leakage has become a huge security threat to BQSDC

Moreover, a more careful analysis reveals that the number of secret information exchanges in the above BQSDC protocols [15-16, 18-26, 30-35] is still not large enough

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