Just found this fascinating wiki page on cryptography.
That was worth it just to know that cryptoanalysis is spelled cryptanalysis! Thanks Eliza!
So I’ve been spelling it wrong all these years, and never guessed.....
“The cat crepped craftily into the cripped, crapped, and crepped craftily out”
By the same reasoning psychoanalysis should really be psychanalysis, and though the battle is surely lost, there are still a few pedants who use the correct form.