Method and system for checking digital signatures and card with microcircuit for using the method
US7721108B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2003 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Feb 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
To check a digital signature, using a microcircuit card, the microcircuit being designed to receive and to process requests to check digital signatures, the process comprises storing in a memory in the microcircuit a certificates table containing digest forms of authorized public keys, and a phase of checking a digital signature consisting of: receiving by the microcircuit the digital signature to be checked and a public key corresponding to a private key that was used to generate the digital signature to be checked; calculating a digest form of the received public key, searching for the calculated digest form of the public key in the certificates table, and decrypting the digital signature using the received public key if the calculated digest form of the public key is located in the certificates table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.