Method and apparatus for masking modulo exponentiation calculations in an integrated circuit
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United States of America Patent
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May 16, 2000
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N/A
app pub date -
Nov 12, 1997
filing date -
Nov 12, 1997
priority date (Note) -
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Abstract
Circuitry which performs modular mathematics to solve the equation C=M.sup.k mod n and n is performed in a manner to mask the exponent k's signature from timing or power monitoring attacks. The modular exponentation function is performed in a normalized manner such that binary ones and zeros in the exponent are calculated by being modulo-squared and modulo-multiplied.
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