Signature generation method, electronic device, and storage medium

US11128450B2 · kind B2 · utility

Assignee

• TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED · CN

Inventors

• Jian Zhang · San Jose, US
• Li WU · Nanhu, CN
• Hai Tao Tu · Lo Wu, CN
• Mao Cai Li · Chengdu, CN
• Li Kong · Lo Wu, CN
• Zi Chao Tang · Lo Wu, CN
• Wen ZOU · Nanhu, CN
• Jun Zang · Lo Wu, CN

Key dates

• Filing date: Nov 7, 2019
• Grant date: Sep 21, 2021
• Expiry date: Dec 7, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2209/68
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A signature generation method performed by an electronic apparatus is provided. A message abstract is generated according to a to-be-signed message and eigenvalues of a plurality of signature parties, an eigenvalue of a signature party being based on a random number of the signature party. Public keys and sub signatures of the plurality of signature parties are obtained, and a sub signature of the signature party is based on the random number of the signature party, the message abstract, and private keys of the plurality of signature parties. An aggregation public key is generated according to the public keys of the plurality of signature parties, and a length of the aggregation public key is less than a length of the plurality of public keys after splicing. An aggregation signature is generated according to a sum value of the plurality of sub signatures and the message abstract.