Secure method for secret key cryptographic calculation and component using said method
US7400723B2 · kind B2 · utility
3Cited by
3References
27Claims
0Family size
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Key dates
| Filing date | Feb 6, 2002 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Jun 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A secured method of cryptographic computation to generate output data from input data and from a secret key includes a derived key scheduling step to provide a derived key from the secret key according to a known key scheduling operation. The method also includes a masking step, performed before the derived key scheduling step, to mask the secret key so that the derived scheduled key is different at each implementation of the method. The present method and component can be used in transfer type applications, such as bank type applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.