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Let N be an n-bit positive integer, and let a, b, c, and k be positive integers less than N. Assume that the multiplicative inverse
Let N be an n-bit positive integer, and let a, b, c, and k be positive integers less than N. Assume that the multiplicative inverse (mod N) of a is ak-1.
Give an O(n3) algorithm for computing a(b^c) mod N (i.e., a raised to the power bc with the result taken mod N). Any solution that requires computing bc is so inefficient that it will receive no credit.
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