Countermeasure to power attack and timing attack on cryptographic operations
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United States of America Patent
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Oct 12, 2004
Grant Date -
N/A
app pub date -
Aug 13, 1999
filing date -
Jun 11, 1999
priority date (Note) -
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Abstract
A cryptography circuit provides secure processing of data by utilizing countermeasures that combat timing and power attacks. Superfluous operations such as multiplication operations, modular reductions by an integer, storage of data to memory are available for use by a processor to disguise the amount of power usage and the amount of time required to perform a cryptographic operation. A cryptographic key is available for use in order to trigger when these emulated operations occur. The occurrences of the emulated operations is controlled by the user to provide the preferred tradeoff between security and use of resources.
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