By my reading he took it seriously, what do you mean by amused?
Sorry my bad, language issues. I meant "fascinated, by the idea". What would be a good word here?
I think "enlightened" might be the word you're looking for. It means both that the hypothetical conveys new information to him and that, as a result of the new information, he comes to a new (and improved) understanding of the larger picture.
The sentence doesn't strike me as 100% native phrasing with that substitution, by the way, but it would be clearly comprehensible.
Keep things like encryption out of regulation; because it can't be.
* edit: was "amused", which was incorrect.