Quantum digital signature method independent of reference system

A quantum digital signature and reference system technology, applied to user identity/authority verification and key distribution, can solve problems such as consuming large resources and not conforming to reality, and achieve the effects of reducing technical difficulty, good performance, and reducing communication cost loss

Active Publication Date: 2022-07-12
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

They require polarization-aligned or interferometrically stable, which are resource-intensive, e.g. implementing a common polarization reference frame in terrestrial and satellite quantum communications is impractical

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  • Quantum digital signature method independent of reference system
  • Quantum digital signature method independent of reference system
  • Quantum digital signature method independent of reference system

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Embodiment Construction

[0053] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings.

[0054] The reference frame independent quantum digital signature method of the present invention specifically includes a key distribution stage and a message stage.

[0055] Key distribution stage: the sender is Alice, and the receivers are Bob and Charlie.

[0056] (1) According to the reference frame independent quantum key distribution protocol, the sender randomly selects the base Z A , base X A , base Y A Prepare the sending state, the receiver randomly selects the base Z B(C) , base X B(C) , base Y B(C) Projection measurements on the received states.

[0057] (2) Alice sends N pulses and randomly selects the BB84 state and the decoy state to prepare, and sends them to Bob or Charlie.

[0058] (3) The receivers Bob and Charlie randomly select X, Y, and Z base projection measurements and publish the measurement results.

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Abstract

The invention provides a quantum digital signature method independent of a reference system, which is applied to a quantum signature system. The quantum digital signature system comprises three participants of a user side Alice, a Bob and a Charlie, the Alice belongs to a signer, and the Bob and the Charlie belong to signed persons. The method comprises a key distribution stage and a message stage, in the key distribution stage, a key is generated by using a reference system independent quantum key distribution protocol, and then in the message stage, the quantum digital signature is completed by using the key generated in the above process. According to the protocol, a relatively high signature rate can still be kept under the condition that a relatively large deflection angle exists between user reference frames, and the performance of the protocol is superior to that of an existing BB84 quantum digital signature protocol.

Description

technical field [0001] The invention belongs to the field of quantum digital signature in quantum communication, in particular to a reference frame independent quantum digital signature method. Background technique [0002] Digital signature is an important cryptographic protocol and is widely used in modern telecommunication, such as distribution of mail and electronic finance. Most of the classic digital signatures, such as RSA, DSA (Digital Signature Algorithm) and ECDSA (Elliptic Curve Digital Signature Algorithm), depend on computational complexity for their security. But unfortunately, with the advent of quantum computing, classical digital signatures are under threat. In the era of quantum computing, secure digital signatures are urgently needed. Compared with classical digital signatures, quantum digital signatures (Quantum DigitalSignature, QDS) are based on quantum mechanics theory, which can ensure the security of communication at the level of information theory...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/08
CPCH04L9/0852H04L9/3247
Inventor 姬亮张春辉王琴
Owner NANJING UNIV OF POSTS & TELECOMM
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