Can I derive the private key from the public key?

I received an email from someone and was asked how they could find a private key from an elliptic curve public key. On the one hand there would be deep ethical questions to answer, but I didn’t probe the reason why they wanted to do this. My answer was … “You might be lucky and find the key, but even if you used all the computers in the world to try and find the key, it will still take you billions and…

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Prof Bill Buchanan OBE

Prof Bill Buchanan OBE

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