Exactly, "crypto" has been hacker jargon for cryptography and its implementations for a long time [a][b]. Since cryptocurrency appeared (and went mainstream), t

Exactly, "crypto" has been hacker jargon for cryptography and its implementations for a long time [a][b]. Since cryptocurrency appeared (and went mainstream), that original jargon has been awash in the tide. a. Like on /r/crypto: https://old.reddit.com/r/crypto/ https://old.reddit.com/r/crypto/ b. "Don't roll your own crypto(graphy)!" is/was a popular hacker slogan: https://hn.algolia.com/?q=Don%27t+roll+your+own+crypto https://hn.algolia.com/?q=Don%27t+roll+your+own+crypto