[bawolff]

> Bitcoin effectively invented, completely from scratch with no precedents I'm aware of, a probabilistic Atomic Total-Order Broadcast algorithm,

Yes, the new thing bitcoin invented was novel and quite interesting. I'm not sure that is the words i would use to name it, but the result still stands.

> Just because the public APIs of those things can be explained in an afternoon doesn't mean at all that they aren't advanced concepts

Of course not. They are advanced concepts because they are some of the most basic concepts in the field and used throughout the industry. Hash functions are so prevalent that we literally have special x86 instructions just to speed up calculating sha256.

Compare for example to things like ZK-SNARKs, or homomorphic encryption which are actually cutting edge cryptography.