How Do We Flip A Billion Coins in a Fair Way and Writing Your Name in Crypto?

Prof Bill Buchanan OBE FRSE
Coinmonks
Published in
4 min readAug 1, 2018

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So let’s say we have one billion people who are in a competition. We have a single toss of the coin, and if you match it, you continue. If not it does not match, then you are out of the competition. How many tosses will it take to get a winner (on average)?

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Prof Bill Buchanan OBE FRSE
Coinmonks

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