Decoy state configurable quantum digital signature method

Abstract

The invention discloses a decoy state configurable quantum digital signature method. The method comprises a distribution stage and an information stage. The distribution stage comprises the followingsteps that: a sender prepares information to be signed into a quantum state and sends the quantum state to a receiver; the sender and a receiver perform basis matching through a channel to obtain a key; the sender and the receiver process the key to obtain an estimated bit error rate; and the key is updated through the estimated bit error rate. The information stage comprises the following steps that a verifier verifies signature information sent by a signer through a secret key; if the verification succeeds, the verifier receives the signature message and sends the signature message to a receiver; and the receiver verifies the signature message according to the key, and receives the signature message if the verification succeeds. In the quantum state preparation stage of the quantum digital signature, the purposes of improving the signature rate and simplifying system operation are achieved by configuring different numbers of decoy states.

Description

technical field [0001] The invention relates to the technical field of quantum digital signatures in quantum communication, in particular to a configurable decoy state quantum digital signature method. Background technique: [0002] Digital signature is one of the most important cryptographic protocols, which has been used in many occasions, such as software distribution, financial transactions, electronic contracts, etc. Typically, classical digital signatures are implemented using public key cryptography. Due to the complexity of one-way mathematical functions, classical digital signatures are generally considered secure when computing resources are limited. However, with major breakthroughs in mathematical algorithms and the rapid development of quantum computers, this claim is untenable. In contrast, quantum digital signatures use the basic principles of quantum mechanics to achieve information-theoretic security digital signature technology. The first quantum digital...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a configurable decoy state quantum digital signature method to solve the defects of high operational difficulty and low signature rate of quantum digital signature systems in the prior art

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