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BigInteger ModInverse

Is this VB calculation

Dim s As BigInteger = (BigInteger.ModPow(k,q - 2,q) * (m + x * r)) Mod q

a proper implementation of this written calculation

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I'm basing my calculation of the fact that

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can be computed by

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as per this Wikipedia article on Digital Signature Algorithm

Solution

  • I can confirm that this equation is correct.