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Null information leakage quantum dialogue protocol with collective retreat phase noise resistance

A technology of information leakage and phase noise, which can be used in security communication devices, digital transmission systems, electrical components, etc., and can solve the problems of QD information leakage and noise interference.

Active Publication Date: 2014-05-28
嘉兴智旭信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0053] The purpose of the present invention is to design a QD protocol without information leakage against collective dephasing noise, and solve the information leakage problem and noise interference problem of QD at the same time

Method used

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  • Null information leakage quantum dialogue protocol with collective retreat phase noise resistance
  • Null information leakage quantum dialogue protocol with collective retreat phase noise resistance
  • Null information leakage quantum dialogue protocol with collective retreat phase noise resistance

Examples

Experimental program
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Effect test

preparation example Construction

[0075] S1) Preparation and delivery of Bob. Bob prepares a sequence of 2N logical qubits, S = { L 1 , L 1 ′ , L 2 , L 2 ′ , · · · , L n , L n ′ , · · · , L N , L N ′ } , Make every two adjacent logical qubits L n and L n ' ( n = 1,2 , . . . , N ) ar...

Embodiment

[0110] 1. Application example of quantum dialogue protocol

[0111] Now use a specific example to explain the two-way communication process of the protocol of the present invention in detail. to the first group as an example. assuming k 1 = 1 and i 1 =0. Moreover, suppose L 1 and was initially prepared at After Alice and Bob encode, L 1 was transformed into Simultaneously constant. Since Bob prepares L himself 1 , he knows its initial state and base of measurement. Bob then chooses the correct measurement base measurement and publicly announce their measurements. According to L 1 The initial state of and its compound unitary operation Bob can read k 1 =1. For Alice, after receiving Bob's After the measurement result of , Alice uses the correct measurement base to measure come to know L 1 initial state. Then, through her compound unitary operation, Alice can also read i 1 =0.

[0112] 2. Discussion

[0113] (1) Information leakage problem ...

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Abstract

The invention provides a null information leakage quantum dialogue protocol with collective retreat phase noise resistance. According to the protocol, logical quantum bit with noise interference invariance resistance of a decoherence-free subspace is utilized for eliminating noise effect, and two legal users secretly share initial state of each logic quantum bit by directly transferring corresponding auxiliary logic quantum bit to overcome the problem of information leakage. In the protocol of the invention, secret information is encoded in the initial logic quantum bit by two composite unitary operation. In addition, decoding only needs single-photon measurement rather than Bell state measurement or complex measurement so that the protocol is easy to execute. Security analysis shows that a plurality of active attacks of Eve can be effectively overcome, such as interception-retransmission attack, measurement-retransmission attack, entanglement-measurement attack and control non-operating attack. In addition, compared with anti-noise quantum dialogue protocols of Yang and Hwang, the null information leakage quantum dialogue protocol has better performance on quantum resource and quantum measurement.

Description

technical field [0001] The invention relates to the field of quantum security communication. The invention designs an information-leakage-free quantum dialogue protocol that is resistant to collective dephasing noise, and simultaneously solves the information leakage and noise interference problems of the quantum dialogue. Background technique [0002] In 1984, since Bennett and Brassard proposed the first Quantum Key Distribution (Quantum Key Distribution, QKD) protocol (the BB84 protocol [1]), the theory of quantum mechanics began to be introduced into the field of classical communication, resulting in what is subsequently called quantum key distribution. This whole new field of secure communication. Since then, many QKD protocols [2-3] have been proposed. As we all know, the goal of QKD is to establish an unconditional security key between two long-distance legitimate users. In 2002, the new concept of quantum secure direct communication (Quantum Secure Direct Communic...

Claims

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Application Information

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IPC IPC(8): H04L9/28H04L29/06
Inventor 叶天语
Owner 嘉兴智旭信息科技有限公司
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