Some of the world’s best mathematicians have been cryptologists, a few of whom played a role in geopolitics during the Second World War.
The stakes may be lower today, but the bragging rights are still worth trying for in the third installment of AquaQ’s ongoing q programming challenge:
In cryptography one of the simplest forms of encryption is the substitution cipher, where you take each letter and pick a replacement for it. Encryption is then as simple as substituting each letter in your message with the replacement letter from the cipher. This type of encryption is usually not difficult to break, since much of the structure in the underlying information remains.