[pwg]

> never make it impossible (until quantum cryptography becomes mainstream maybe?)

Even in the 'quantum cryptography' world it still has a hole. In order for the client to "use" (i.e., view, play, etc.) the encrypted stream, the client needs:

1) the encrypted stream data

2) the key necessary to decrypt the data (because without the key, the client can't decrypt the data in order to play/view it).

Item #2 is where the breaks will always occur, even with quantum cryptography. An attacker does not have to break the cryptography, they just have to find where the key exists that allows decryption and once they have that key, they can decrypt as they like (at least for that stream, assuming one-off encryption for that one stream).

If you give people a locked box, and you also give them the key necessary to unlock the box, some number of them will use the key to unlock the box, even if you tell them not to do so.