Post-quantum collaborative signature method and device based on key segmentation and medium

Through key segmentation technology and grid cryptography algorithm, we collaborate with users to generate segmented public and private keys, embed signature shards of identity information, and combine discrete Gaussian distribution and zero-knowledge proof, the centralized problem of collaborative signature in the quantum computing environment is solved, and an efficient and secure signature process is achieved, suitable for the Internet of Things, blockchain and distributed finance.

CN120528600AActive Publication Date: 2025-08-22中电信量子信息科技集团有限公司
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Patent Information

Application Number
CN202511014958.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-23
Publication Date
2025-08-22
Estimated Expiration
2045-07-23

AI Technical Summary

Technical Problem

In the quantum computing environment, the existing collaborative signature scheme relies on the key generation center, is vulnerable to attacks, and is difficult to achieve decentralized key generation and efficient and secure multi-party collaborative signature.

Method used

Key segmentation technology is adopted, each collaborative user generates the segmentation public key and the segmentation private key by itself, and uses the grid cryptography algorithm to perform key segmentation, generate signature shards and embed identity information, and use discrete Gaussian distribution and zero-knowledge proof for signature verification to realize decentralized key generation and efficient and secure signature process.

Benefits of technology

It realizes efficient and secure multi-party collaborative signatures in the post-quantum era, ensures the security and reliability of signatures, supports decentralized key generation, and is suitable for scenarios with high security needs such as the Internet of Things, blockchain and distributed finance.

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Abstract

The invention provides a post-quantum collaborative signature method and device based on key segmentation and a medium, and relates to the technical field of information security. The method comprises the following steps: acquiring segmentation public keys and segmentation private keys of a plurality of collaborative users; according to the user identifiers of the plurality of collaborative users, respectively calculating binding information of the plurality of collaborative users for the signature fragments of the to-be-sent message; according to the segmentation private key and the binding information of each collaborative user, calculating a signature value of each collaborative user for the signature fragment; generating a target signature of the to-be-sent message according to the signature values of the plurality of collaborative users for the signature fragments; and verifying the target signature and outputting the target signature according to the segmented public keys of the plurality of collaborative users. According to the invention, the security and reliability of the collaborative signature can be improved.
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