Method of modifying secrets included in a cryptographic module, notably in an unprotected environment
US8411864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2008 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Mar 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2129
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of modifying a set of secrets in a cryptographic module, to ensure that the modifying is either successful or invalid. The module includes readable version numbers for each secret and for the set of secrets. If the version number of the set of secrets is equal to a version number requiring the loading of a set of new secrets, the version number of the set of secrets of the cryptographic module is set to a distinctive number indicating that the cryptographic module is being reloaded. Next, for each secret, if the version number of the secret is different from the version number of the corresponding new secret to be loaded, the new secret and its version number are loaded. Next the version number of the set of secrets of the cryptographic module is set to the version number of the set of new secrets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.