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Information-disclosure-free two-way quantum secure direct communication protocol based on Bell state and control-not-operation

A technology for secure direct communication and information leakage, applied in the field of quantum secure communication

Inactive Publication Date: 2014-04-30
上海星地通讯工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Tan and Cai [14] found in 2008 that two-way quantum-safe direct communication may have a "classical correlation"

Method used

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  • Information-disclosure-free two-way quantum secure direct communication protocol based on Bell state and control-not-operation
  • Information-disclosure-free two-way quantum secure direct communication protocol based on Bell state and control-not-operation
  • Information-disclosure-free two-way quantum secure direct communication protocol based on Bell state and control-not-operation

Examples

Experimental program
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preparation example Construction

[0052] S1) Preparation of Bell state: Alice prepares N+δ 1 +δ 2 EPR pairs randomly in one of the four Bell states, where N EPR pairs are used for secret information transmission, δ 1 +δ 2 An EPR pair is used for security testing. { [ P 1 ( a ) , P 1 ( b ) ] , [ P 2 ( a ) , P 2 ( b ) ] , . . . , [ P n ( a ) , P n ( b ) ] , ...

Embodiment

[0061] 1. Application example of two-way quantum secure direct communication protocol

[0062] An example is given here to further explain the protocol of the present invention. Assume that the first Bell state prepared by Alice is And suppose Alice and Bob use this Bell state to send bits "10" and "01" to each other respectively. in possession of particle a 1 and b 1 Afterwards, Bob's implement control non-operations (in the form of a 1 To control the qubit, take b 1 is the target qubit). so, Will evolve as follows:

[0063] C C - Not ⊗ | φ + > a 1 b 1 = 2 | + > a 1 | 0 ...

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Abstract

The invention provides an information-disclosure-free two-way quantum secure direct communication protocol based on the Bell state and the control-not-operation. According to the protocol, firstly, a rule generated when the control-not-operation is performed on the Bell state is found, and namely, after the control-not-operation is performed on one Bell state, the Bell state will collapse to form two independent particles without any tangle. According to the rule, a communication making party can automatically know the state of the two independent particles after the control-not-operation. Another communication party can also know the state of the two independent particles after the control-not-operation through X-base or Z-base measurement. Thus, the two communication parties can secretly share the state of the two independent particles after the control-not-operation, and no information is disclosed to Eve. The efficiency of the theory of information of the protocol reaches 100% and is higher than that of a previous information-disclosure-free two-way quantum secure direct communication protocol. The protocol has another advantage that only single-particle measurement needs to be carried out.

Description

technical field [0001] The invention relates to the field of quantum security communication. The present invention designs a two-way quantum safe direct communication protocol based on Bell state and control non-operation without information leakage, and makes full use of the rules generated after control non-operation in Bell state to overcome the problem of information leakage. Background technique [0002] As a special quantum secure direct communication, the goal of two-way quantum secure direct communication is to realize the two-way transmission of secret information between the communicating parties. Since it was independently proposed by Zhang et al. [1-2] and Nguyen [3] in 2004, scholars have proposed many two-way quantum secure direct communication protocols [4-13]. However, Tan and Cai [14] found in 2008 that there may be "classical correlation" in two-way quantum-safe direct communication. At the same time, Gao et al. [15-16] also pointed out in 2008 that "info...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00
Inventor 黄凌云叶天语
Owner 上海星地通讯工程研究所
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