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A multi-party controlled two-way quantum secure direct communication method and system based on cluster state

A secure direct communication, multi-party technology, applied in the field of multi-party controlled two-way quantum secure direct communication, to achieve the effect of high transmission efficiency, guaranteed security, efficient and secure quantum secure direct communication

Active Publication Date: 2020-10-30
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The protocol is simple and convenient, but unfortunately it has some security holes

Method used

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  • A multi-party controlled two-way quantum secure direct communication method and system based on cluster state
  • A multi-party controlled two-way quantum secure direct communication method and system based on cluster state
  • A multi-party controlled two-way quantum secure direct communication method and system based on cluster state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Please refer to figure 1 , a multi-party controlled two-way quantum secure direct communication method based on the cluster state, comprising steps:

[0088] S1. The control terminal sets an ordered 2n particle cluster state sequence of a preset length, and the ordered 2n particle cluster state sequence is in a preset state Among them, σ z =|0>

[0089] S2. The control terminal takes out a particle from each 2n particle entangled state in the ordered 2n particle cluster state sequence to form 2n ordered particle sequences respectively, and saves the particles of each ordered particle sequence order, each particle sequence contains a particle in each 2n particle entangled state in the ordered 2n particle cluster state sequence;

[0090] S3. The control terminal respectively scrambles the particle sequences of the 2n ordered particle sequences, and sends the scrambled 2n particle sequences to 2n communication terminals respectively, that is, after the tth scrambled se...

Embodiment 2

[0120] Please refer to figure 2 , a controlled two-way quantum-safe direct communication system 7 based on a cluster state, including a control terminal 4 and 2n communication terminals 1;

[0121] The control terminal 4 includes a first memory 5, a first processor 6 and a first computer program stored on the first memory 6 and operable on the first processor 6, and the communication terminal 1 includes a second memory 2 , the second processor 3 and the second computer program stored on the second memory 2 and operable on the second processor 3, the first processor 6 implements the first computer program when executing the first computer program The steps executed by the control terminal 4;

[0122] When the second processor 2 executes the second computer program, the steps performed by the communication terminal 1 in the first embodiment are realized.

Embodiment 3

[0124] Apply the above cluster state-based four-way controlled two-way quantum secure direct communication method to practical application scenarios:

[0125] Step S1: if Figure 4 As shown, there are four communication terminals: Alice, Bob, Charlie and David, that is, users, and a semi-trusted control terminal, Trent, that is, the administrator. Alice and Charlie, Bob and David carry out two-way information transmission through Trent ; Alice put the secret message sent to Charlie, and at the same time, Charlie sends the secret message Send to Alice; Bob sends the secret message Send to David, at the same time, David sends the secret message send to Bob;

[0126] Step S2: Administrator Trent prepares an ordered four-particle cluster state sequence with length l=2N+4δ, each sequence is in state. Trent takes out one particle from each four-particle entangled state to form four ordered particle sequences: A={a 1 ,a 2 ,...,a l}, B={b 1 ,b 2 ,...,b l}, C={c 1 ,c ...

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PUM

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Abstract

The invention provides a controlled bidirectional quantum secure direct communication method and a system based on a cluster state. Communication between 2n communication ends which are interacted inpairs is controlled through a control end; two communication parties only need to transmit the signal particles once; mutual transmission of secret messages of the two parties can be realized; highertransmission efficiency is obtained; a particle sequence used for communication between the communication ends is distributed by the control end; only after the verification of the controlled end is passed; the communication end can obtain a correct particle sequence; according to the quantum secure direct communication method and device, the secret information is embedded into the correct particle sequence, the secret information is not embedded into the signal particles transmitted in the public quantum channel, an eavesdropper cannot obtain the secret information by attacking the particles,the security of quantum secure direct communication is ensured, and efficient and secure quantum secure direct communication is achieved.

Description

technical field [0001] The invention relates to the technical field of quantum information, in particular to a multi-party controlled two-way quantum secure direct communication method and system based on a cluster state. Background technique [0002] Quantum Secure Direct Communication (QSDC) is an important branch of quantum communication, which refers to the direct transmission of secret messages between two parties using quantum states as information carriers through quantum channels. Compared with quantum key distribution, quantum secure direct communication achieves higher communication efficiency. Because the quantum key distribution transmits a string of random keys, the two parties need to conduct another classical communication to complete the transmission of the secret message. However, since QSDC transmits secret messages, eavesdropping (even if it can be detected) on part of the information will be fatal. Therefore, compared with quantum key distribution, quan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70H04B10/85H04L9/06H04L9/00
CPCH04B10/70H04B10/85H04L9/002H04L9/0618
Inventor 刘晓芬林崧郭躬德
Owner FUJIAN NORMAL UNIV
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