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Quantum blind double signature method for resisting collective noise

A quantum and noise technology, applied in the field of quantum signatures, can solve problems such as low information fidelity and collective noise interference

Active Publication Date: 2020-05-01
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a quantum blind double signature method against collective noise to solve the problem of low information fidelity caused by collective noise interference in the actual channel in the prior art

Method used

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  • Quantum blind double signature method for resisting collective noise
  • Quantum blind double signature method for resisting collective noise
  • Quantum blind double signature method for resisting collective noise

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Embodiment 2

[0157] In this embodiment, the validity of the method provided by the present invention is verified, and the security analysis of the protocol provided by the present invention is as follows, assuming that the eavesdropper is Eve.

[0158] In the protocol, decoy logical qubits are inserted in each sequence of logical qubits. trick logical qubits from {|0 dp >,|1 dp >,|+ dp >,|- dp >} randomly selected. (If it is resistant to collective rotation noise, the decoy logic qubit corresponding to the selection is {|0 r >,|1 r >,|+ r >,|- r >}. )

[0159] Without knowing the state of the decoy logical qubit, if Eve performs an intercept-resend attack on the decoy logical qubit, the probability of detecting the attack is 1 / 2. If Eve performs an intercept-measure-resend attack, the probability of detecting the attack is 1 / 4. For logical qubits, the probability of being detected is Obviously, as the number of attacks t increases, the probability of finding an Eve attack will...

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Abstract

The invention discloses a quantum blind dual signature method for resisting collective noise. According to the method provided by the invention, collective phase shift noise and collective rotation noise can be resisted respectively; three parties exist in the method and includes an information owner Alice, a signer Charlie, and a receiver Bob, wherein Alice and Charlie sign initial information, the signature is verified by Bob, a signer cannot know the specific content of the information, and meanwhile, due to the use of logic quantum bits, the method provided by the invention not only can resist the interference of collective noise, but also can improve the security of the protocol.

Description

technical field [0001] The invention relates to a quantum signature method, in particular to a blind double signature method with a third party. Background technique [0002] Quantum signature (QS) is a combination of digital signature and quantum mechanics. From the first quantum signature protocol proposed by Danial Gottesman to the present, there have been many signature protocols. Quantum Blind Double Signature (QBDS) is one such signature protocol that allows messages to attach proofs to their messages. For example, Alice is the buyer, they will provide initial information and need to sign their own payment. Charlie, working on behalf of the bank, signed Alice's information without knowing the buyer's initial information. [0003] The prior art proposes quantum-blind double-signature protocols based on different technologies, one of which is based on the OQKD protocol. The message owner calculates the Hash value of the classic message to be signed and encodes it into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/08H04L29/06
CPCH04L9/0858H04L9/3257H04L63/12
Inventor 曹正文王磊王家耀张明慧彭进业曾贵华师静静余泽芳
Owner NORTHWEST UNIV(CN)