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A Controlled Quantum Secure Direct Communication Method Based on Huffman Compression Coding

A technology of secure direct communication and compression coding, applied in the field of controlled quantum secure direct communication QSDC, can solve problems such as low transmission efficiency, and achieve the effects of improving transmission efficiency, reducing transmission, and improving communication transmission efficiency

Active Publication Date: 2020-06-05
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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  • A Controlled Quantum Secure Direct Communication Method Based on Huffman Compression Coding
  • A Controlled Quantum Secure Direct Communication Method Based on Huffman Compression Coding

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Embodiment Construction

[0026] In this scheme, remember that the sender and receiver of the communication are Alice and Bob respectively, the controller is Charlie, and the eavesdropper is Eve. The specific steps of the present invention are introduced as follows:

[0027] Step 1, Alice prepares a series of Bell states: That is, EPR entangles particle pairs and divides them into two sets of sequences S A and S B , where all particles "1" give the sequence S A , the particle “2” gives the sequence S B ; Alice and Bob design the same sequence generator, that is, a nonlinear combination structure of a linear feedback shift register (LFSR), which is irreversible. In this embodiment, the sequence generator is designed as an n=8-level structure, and Charlie sets the initial state of the sequence generator at this time.

[0028] The design rule of the nonlinear combination structure of LFSR is as follows: Let the output sequences of three n-level LFSRs be L 1 , L 2 , and L 3 , the pseudo-random sequ...

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Abstract

The invention discloses a controlled quantum secure direct communication method based on Huffman compression coding. The sender Alice and the receiver Bob design the same sequence generator. The control party Charlie sends the initial state of the sequence generator, and both communicating parties generate The same pseudo-random sequence. Alice uses Huffman compression coding to compress the original information, and XORs the compressed sequence with the pseudo-random sequence to form a sequence S 1 . Alice sends sequence S B Check the channel security for Bob. If the channel is safe, Alice will S 1 Divided into odd sequences and even sequences, the odd and even sequences are encoded differently and then loaded into S A Send it to Bob on the remaining particles; otherwise, give up this communication. After Bob detects that the channel is safe, he measures the decoding recovery sequence S 1 , and change S 1 XOR with the pseudo-random sequence to obtain the compressed sequence, and Bob can obtain the original information by decompressing the compressed sequence. This method can effectively improve the transmission efficiency of quantum secure direct communication.

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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
CPCH04L9/0858
Inventor 曹正文李艳彭进业曾贵华宋丹赵光
Owner NORTHWEST UNIV