The Most Important Software In History: RSA

Ron Rivest, Adi Shamir and Len Adelman leveraged the idea of a public and private key and came up with the RSA encryption algorithm - the most downloaded software in existence. You're using this algorithm to watch this video over HTTPS. You use it when you SSH into a private server as well. Brilliant, elegant and brutally simple - we're going to write this algorithm ourselves to understand how it works.