I have nothing against the author. I just don&#x27;t think the text is a proper intro to cryptography and I also think it is dangerous for a noob to read this and go implement crypto.<p>That being said, creating a programming language does not necessarily qualify one to do proper cryptography: they are two quite separate skill sets. In fact he himself readily admits he is not a cryptographer. There&#x27;s nothing wrong with that.<p>EDIT: When I think about it, the fact that something like this comes from a person with stellar reputation makes it doubly scary.