The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2022
Filed:
Dec. 18, 2017
Shenzhen Olym Information Security Technology Co., Ltd., Shenzhen, CN;
Zhaohui Cheng, Shenzhen, CN;
Feng Du, Shenzhen, CN;
SHENZHEN OLYM INFORMATION SECURITY TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
A digital signature method, a device, and a system of the present invention can generate a partial signature private key T corresponding to a user by a key generation center using a digital signature algorithm based on the EC-Schnorr, and sign a message M by using a standard digital signature algorithm such as the ECDSA. In the calculation of generating the second part w of the partial signature private key T, a signature assignment R is used, and the signature assignment R is a hash digest of a message including at least a pre-signature Π and an ID of a signature side. When signing the message M and verifying the signature of the message M, the operation requiring M as input uses a concatenation of R and M as input. The present invention uses a mechanism to connect two signature algorithms to ensure that the constructed complete algorithm can effectively resist known attacks.