Multi signature verification system, electronic signature attaching apparatus, data addition apparatus, and electronic signature verification apparatus
US7627763B2 · kind B2 · utility
3Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2005 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Feb 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi signature verification system adds new additional data to original data with a signature attached thereto and verifies validity of the original data and the additional data. The system includes an electronic signature attaching apparatus including an electronic signature attaching unit attaching an electronic signature to original data previously created, acquired trapdoor hash value, and identification information, a data addition apparatus, and an electronic signature verification apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.