Well if it's encrypted, how will you get a warrant for unknown data. And if you do have proof, then why do you need the data ? In these cases I think the only r

Well if it's encrypted, how will you get a warrant for unknown data. And if you do have proof, then why do you need the data ? In these cases I think the only reliable and best way is to obtain the data by infiltration. It's a bit like asking a burglar to break in. You either have enough proof, or you catch them in the act.