Protection of a ciphering algorithm
US8582757B2 · kind B2 · utility
1Cited by
1References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 26, 2009 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Feb 19, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/004
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for protecting the execution of a ciphering or deciphering algorithm against the introduction of a disturbance in a step implementing one or several first values obtained from second values supposed to be invariant and stored in a non-volatile memory in which, during an execution of the algorithm: a current signature of the first values is calculated; this current signature is combined with a reference signature previously stored in a non-volatile memory; and the result of this combination is taken into account at least in the step of the algorithm implementing said first values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.