Controlled quantum secure direct communication method based on Huffman compression coding

Abstract

The invention discloses a controlled quantum secure direct communication method based on Huffman compression coding, which is characterized in that a sender Alice and a receiver Bob design the same sequence generator, a control party Charlie enables the two communication parties to generate the same pseudo-random sequence through sending the initial state of the sequence generators; the sender Alice performs compression on the original information by using Huffman compression coding, and carries out an exclusive-or operation on the compressed sequence and the pseudo-random sequence to form a sequence S1; the sender Alice sends a sequence SB to the receiver Bob to detect the channel security, if the channel is secure, the sender Alice divides the sequence S1 into an odd sequence and an even sequence, and the odd sequence the even sequence are differently coded, then loaded to remaining particles SA and sent to the receiver Bob; and if not, the communication is abandoned. The receiver Bob measures decoding and recovers the sequence S1 after detecting the channel security, and performs an exclusive-or operation on the sequence S1 and the pseudo-random sequence to obtain a compressed sequence, and the receiver Bob decompresses the compressed sequence to acquire the original information. The transmission efficiency of quantum secure direct communication can be effectively improved according to the method disclosed by the invention.

Description

technical field [0001] The invention belongs to the field of quantum security communication, and in particular relates to a controlled quantum security direct communication QSDC method based on Huffman compression coding. Background technique [0002] Quantum communication is an important research direction in quantum information science. It has developed rapidly in the past two decades and provides a new way of thinking for secure communication systems. Quantum secure direct communication transmits confidential information directly without establishing a key in advance during the communication process. As an important branch of quantum communication, it has attracted scholars in related fields to carry out in-depth research. [0003] Document 1 "Quan Dongxiao, Pei Changxing, Liu Dan, Zhao Nan. Single-photon-based single-vector quantum secure communication protocol [J]. Acta Physica Sinica, 2010,59(4):2493-2497." proposed a method based on In the single-photon one-way QSDC ...

AI Technical Summary

Problems solved by technology

The transmission efficiency of quantum communication is related to the total number of qubits and classical bits used. The larger their sum is, the lower the transmission efficiency is.

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