Method to prevent power dissipation attacks on a cryptographic algorithm by implementing a random transformation step
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United States of America Patent
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Jul 4, 2006
Grant Date -
N/A
app pub date -
Mar 17, 1999
filing date -
Mar 17, 1998
priority date (Note) -
Expired
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Abstract
A data protection method using a cryptographic algorithm comprising at least one execution cycle of repetitive operations for processing data elements (K2, R1) so as to generate encrypted information (C). At least one step (120, 220) is provided for randomly modifying the execution of at least one operation from one cycle to another, or at least one of the data elements, so that the encrypted information is unchanged by this random modification.
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