> Things that use crypto are not crypto. It's questionable that these thing even use "crypto". Cryptocurrencies are named so because they use "cryptographic si

> Things that use crypto are not crypto. It's questionable that these thing even use "crypto". Cryptocurrencies are named so because they use "cryptographic signatures". While the modular arithmetic used here is very similar to that used in "encryption", "hidden writing" doesn't take place, as the name might suggest. Signatures are more of a dual concept to cryptography than actual cryptography. (One more note: applying a hashing algorithm may be considered "one-way encryption". In areas where this is used for signatures, an argument might be made that this is cryptography).