Exponentiation calculation apparatus and method for calculating square root in finite extension field
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United States of America Patent
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May 7, 2013
Grant Date -
Mar 11, 2010
app pub date -
Feb 26, 2009
filing date -
Sep 10, 2008
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Abstract
In a computing device that calculates a square of an element in a finite field, a vector representation of the element in the finite field is accepted. The vector representation includes a plurality of elements. The computing device performs a multiplication operation on a base field using the accepted elements, and obtains a multiplication value. The multiplication operation is determined by a condition under which the element in the finite field is placed in an algebraic torus. The computing device performs an addition and subtraction operation using the obtained multiplication value and the accepted elements, and obtains a calculation result of the square of the element. The addition and subtraction operation is determined by the condition. The computing device then outputs the calculation result.
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