'People "know" this already, but they don't really know it in their gut, and we think the reason for that is that very few people actually know how to implement the best-known attacks. So, mail us, and we'll give you a tour of them.'
As Hegel said, "The familiar is not understood precisely because it's familiar." Das Bekannte überhaupt ist darum, weil es bekannt ist, nicht erkannt.
I live this every day as a teacher. Students believe they understand, say, linked lists because they can recite all sorts of Linked List Facts™. It's not until you put them in front of a problem with a linked-list-shaped hole that they truly come to understand (erkennen).