If the authorities have a proper search warrant, I don't see why he can't be compelled to give his encryption keys. It is no different than being compelled to provide the key to a locked desk. The location of the key is irrelevant, whether it be in his mind or on his keychain.

The last of the general interest genre.

The first time I drove down Franklin Avenue in Los Angeles and saw the sign in front of their building that says "Church Of Scientology Celebrity Centre International" I was pretty sure this wasn't really a religion.

If teleporting a human requires making a copy and destroying the original, then the obvious question is: is the copy still me? This raises the interesting question of what exactly constitutes personal identity. Here is a very entertaining and amusing read on the topic by Daniel Dennet, a first-rate philosopher and all-around funny guy.