1. Let p be a prime and let g be a primitive root modulo p. Let a be an integer which is relatively Prove that a has a square root modulo p (i.e., there exists an integer b such that b² = a (mod p)) if and only if the discrete logarithm log, (a) is even. prime to p.

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[Algebraic Cryptography] How do you solve this?

1.
Let P be a prime and let g be a primitive root modulo p. Let a be an integer which is relatively
prime to p. Prove that a has a square root modulo p (i.e., there exists an integer b such that b² = a (mod p))
if and only if the discrete logarithm log, (a) is even.
Transcribed Image Text:1. Let P be a prime and let g be a primitive root modulo p. Let a be an integer which is relatively prime to p. Prove that a has a square root modulo p (i.e., there exists an integer b such that b² = a (mod p)) if and only if the discrete logarithm log, (a) is even.
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