Electronic group signature method with revocable anonymity, equipment and programs for implementing the method
US7526651B2 · kind B2 · utility
12Cited by
0References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 2004 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jan 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A ring-signature scheme is adapted so that at least one of the variability parameter values used is an identity trace of the anonymous signatory, determined as a function of anonymity withdrawal data stored and held secret by an anonymity withdrawal entity in connection with an identification of the anonymous signatory. This provides a subsequent controlled capacity of withdrawing the anonymity of the signatory, either by an authority, or by the signatory himself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.