Digital signature generating method and digital signature verifying method
US6816969B2 · kind B2 · utility
34Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Feb 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a signature generating method where not necessarily all of a plurality of signature generating devices work together each time to generate signatures, the present invention seeks to correctly and securely reflect data relating to previous signatures.When generating signatures, the data used for the next signature is sent beforehand to the other signature generating devices. Also, when generating signatures, at least one of the devices is used consecutively, thus allowing history data to be shared during signature generation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.