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Patent Searching and Data


Title:
SIGNING METHOD, DEVICE, AND SYSTEM EMPLOYING SECURE MULTI-PARTY COMPUTATION
Document Type and Number:
WIPO Patent Application WO/2020/181427
Kind Code:
A1
Abstract:
Embodiments of the description disclose a signing method, device, and system employing secure multi-party computation (SMPC). The method comprises: acquiring transaction data, and generating a transaction hash from the transaction data by using a pre-configured rule; determining a signing level of the transaction data according to a relationship between a transaction ceiling in the transaction data and a first threshold; determining a signing organization on the basis of the signing level, the signing organization being a trusted organization that signs the transaction data; and performing SMPC-based signature verification on the transaction hash on the basis of a private key slice stored by the determined signing organization and a private key slice stored by a client, wherein the trusted organization and the client respectively store the private key slices, and the private key slice consists of part of a child private key acquired by slicing an asymmetric key. The embodiments of the description eliminate security risks caused by a lost or stolen private key, and dramatically improves security of transaction.

Inventors:
TANG HONGGANG (CN)
XIE XIANG (CN)
SUN LILIN (CN)
Application Number:
PCT/CN2019/077527
Publication Date:
September 17, 2020
Filing Date:
March 08, 2019
Export Citation:
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Assignee:
PLATON CO LTD (CN)
International Classes:
G06Q20/38
Foreign References:
CN106251146A2016-12-21
CN106251146A2016-12-21
CN109219950A2019-01-15
CN107623569A2018-01-23
CN105096118A2015-11-25
US20170330177A12017-11-16
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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