Security method using electronic signature
US7779262B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jan 7, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/126
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A security method using an electronic signature, which improves the performance of an electronic signature authentication by generating and verifying an electronic signature using a mediator, and acquires a forward security in an electronic signature generation and verification by adding a forward secure signature of semi-trusted party (SEM) to a partial signature value generated based on a secret key piece of the SEM. A public key and an optional secret key composed of two kinds of pieces are generated by a certificate authority in response to a request from a user terminal device. The secret key pieces are issued to the user terminal device and a semi-trusted party not to be overlapped with each other. A first signature piece generated from the issued pieces of the private key is transmitted to the user terminal device from the semi-trusted party when a certificate of the user terminal device is still valid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.