Welcome to the resource topic for 2020/1041
Title:
Sign in finite fields
Authors: Abraham Westerbaan, Bas Westerbaan
Abstract:Often in cryptography one needs to make a consistent choice of square root in a finite field. We show that such a choice is equivalent to providing a reasonable sign function. Then we show that for \mathbb{F}_{p^k} (with odd prime p \neq 1 and k\neq 0) such a sign function exists if and only if k is odd.
ePrint: https://eprint.iacr.org/2020/1041
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