Digital signature method based on identification information of group members, and method of acquiring identification information of signed-group member, and digital signature system for performing digital signature based on identification information of group members
US7590850B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2004 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Jan 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3255
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital signature method based on identification information of one or more group members who belong to a group includes: a) a group parameter generating operation generating group public key information and group secret key information corresponding to the group; b) a member registering operation generating member secret key information using identification information of the group members who belong to the group and an identification information digest value obtained by applying a predetermined hash function to the identification information, and transmitting the member secret key information to the group members; c) a digital signing operation generating a digital signature by applying a predetermined signature algorithm to the identification information and the identification information digest value, and transmitting the generated digital signature and a message; and d) an authentication operation verifying a validity of the digital signature by applying a predetermined authentication algorithm to the message and the digital signature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.