COUNTERMEASURE METHOD AGAINST SIDE CHANNEL ANALYSIS FOR CRYPTOGRAPHIC ALGORITHMS USING BOOLEAN OPERATIONS AND ARITHMETIC OPERATIONS
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United States of America Patent
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Issued Date -
Apr 23, 2015
app pub date -
Mar 4, 2013
filing date -
Mar 2, 2012
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a countermeasure method against side channel analysis for cryptographic algorithm using Boolean operations and arithmetic operation. To protect a cryptographic algorithm combining Boolean and arithmetic instructions against first order side channel analysis, it is necessary to perform conversions between Boolean masking and arithmetic masking. The present invention proposes a new conversion method from arithmetic masking to Boolean masking, using only one precomputed table T. Said table T being configured so that to convert from arithmetic to Boolean masking k-bit nibble by k-bit nibble for integers having a size greater than k bits while adding a masked carry from the modular addition to the nibble.
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