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Jan
31
asked Reducing key shares in Damgård-Dupont threshold RSA
Jan
31
awarded  Informed
Jan
29
comment Negative exponents in Shoup's threshold RSA?
Ah, thank you very much. I thought I couldn't divide at all, since I'm not in a field. I completely forgot that $a^{-1} \text{ mod } n$ also exists when $a$ and $n$ are coprime, which, $n$ being the product of two large primes, is reasonably often the case here.
Jan
28
asked Negative exponents in Shoup's threshold RSA?