A quantum digital signature method and system

Abstract

The invention provides a quantum digital signing method and system. For a pre-signing message m, m is equal to 0 and 1, a message signing module prepares two quantum state sequences with replicability and sends to a message authentication module and a message verifying module respectively; the message authentication module and the message verifying module measure quantum bit coding states and calculate the determinacy of the quantum bit coding states according to measured bits, and the message authentication module and the message verifying module respectively calculate the relevance of the measured bits based on the determinacy of the quantum bit coding states; when the relevance meets requirements, for a signing message m, m is equal to 0 or 1, the message authentication module authenticates the signing message m according to comparison between a corresponding authentication bit string and the basic bit string of the message signing module; after the authentication is successful, the message verifying module verifies the signing message m according to comparison between a corresponding verifying bit string and the basic bit string of the message signing module. The quantum digital signing method and system overcomes all technical challenges of the existing quantum digital signing schemes.

Description

technical field [0001] The invention relates to the technical field of optical transmission information security, in particular to a quantum digital signature method and system. Background technique [0002] Quantum communication is a frontier subject at the intersection of cryptography and quantum mechanics. It is based on the basic principles of quantum mechanics to ensure the realization of various cryptographic tasks that are secure under the conditions of information theory. With the continuous progress of quantum information technology, especially the in-depth study of super classical computers and quantum computers, various cryptographic protocols widely used in classical cryptography based on computational complexity problems, such as public key encryption algorithm RSA , Advanced Encryption Standard AES and other security will be greatly challenged. [0003] For example, on December 12, 2009, the number RSA-768 (768-bit, 232-digit number) was successfully decompose...

AI Technical Summary

Problems solved by technology

However, since various existing quantum digital signature protocols need to authenticate the quantum channel (that is, the quantum channel is safe) as an important premise, that is, the quantum state transmitted through the quantum channel cannot be tampered with and perfectly identified, so it is different from the quantum Compared with key distribution, various current quantum digital signature protocols are difficult to implement

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