Prof Bill Buchanan OBE FRSE
1 min readJul 22, 2020

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  1. Yes. She needs to test they are squares.
  2. She will be commiting to the wrong positive value (N-x) and not x.

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Prof Bill Buchanan OBE FRSE

Professor of Cryptography. Serial innovator. Believer in fairness, justice & freedom. Based in Edinburgh. Old World Breaker. New World Creator. Building trust.