Protection of a calculation performed by an integrated circuit
US8588407B2 · kind B2 · utility
2Cited by
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8Claims
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Assignee
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Key dates
| Filing date | Dec 15, 2006 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Aug 12, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/7271
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and a circuit for protecting a digital quantity over a first number of bits, in an algorithm executing at least one modular exponentiation of data by the quantity, the steps including at least one squaring up and at least one multiplication and implementing, for each bit of the quantity, different calculation steps according to the state of the bit, a same number of multiplications being performed whatever the state of the bit and all the calculation steps using a multiplication being taken into account to calculate a final result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.