Multi-party quantum digital signature method without trusted center

Abstract

The invention discloses a multi-party quantum digital signature method without a trusted center. The method comprises the following steps: step a, a sender performs operation on an original text to obtain a reduced original text; step b, the sender generates a signature and sends the signature to verification parties separately; step c, each two verification parties exchange the partially owned signature; step d, the sender sends the original text and the signature generated in step b to one verification party; step e, the current verification party performs operation on the received original text to obtain the reduced original text, and performs comparison verification on the signature received from the sender or the previous verification party and the owned signature after the exchange in step c according to each bit of the reduced original text; and after the verification is passed, the other verification parties perform verification in sequence until a preset number of verification parties pass the verification. By adoption of the multi-party quantum digital signature method disclosed by the invention, the problem that a large number of keys are needed in single bit signature is overcome, the multi-party signature demands can be satisfied, and the application scenes are greatly expanded.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a multi-party quantum digital signature method without a trust center. Background technique [0002] Digital signature technology is generally used to prove the identity of the digital information sender and the authenticity of the digital information itself, such as digital information in financial services, software updates, and legal contracts. More importantly, the digital signature guarantees the transmittability of the message, that is, the message is forwarded again after being received, and the forwarded person still thinks it is valid. The current mainstream digital signature technology uses public key encryption algorithm. [0003] The classic digital signature algorithm is based on the computational complexity of mathematical algorithms. Due to the computational complexity and no strict theory to prove its security, coupled with the increasing computing ...

AI Technical Summary

Problems solved by technology

[0032] The invention provides a multi-party quantum digital signature method, which overcomes the problem that a single-bit signature requires a large number of keys, greatly reduces the consumption of quantum keys and the pressure on quantum communication equipment by reducing the length of the original text, and can meet the needs of multi-party signatures. Applicable scenarios are greatly expanded

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