Another book recommendation on top of Paar/Pelzl - is “Elementary Number Theory” by Rosen.
This is what nostr:npub12eml5kmtrjmdt0h8shgg32gye5yqsf2jha6a70jrqt82q9d960sspky99g read immediately after Understanding Cryptography to begin his descent into the rabbit hole.
There’s a section on ZKPs at around Chaoter 10 or 11 to entice one to work their way through it.
