So, if you bought a DVD licensed by Sony, can they now legally enter your house and take your DVD?
Or can Sony have some sort of DRM that prevents the DVD from playing when Sony loses the license agreement?
I’m just trying to reconcile how digital purchases can be subject to license terms changes, while a DVD apparently can’t be.
That makes sense, but then the next part is:
Surely that would still be a possibility?
I mean, sure. That’s basically how always-online DRM for games works. But the fact is that you do still have the disc with data on it, so generally it’s just a matter of time before someone comes up with a way to bypass or spoof the DRM.
I think it’s set up this way so buyers can’t get back to Sony to ask for a free replacement if the media can’t be used anymore.
Let’s say you buy a disk that contains a movie. You din’t buy the right to watch that movie forever, because if the disk breaks, you need to buy a new copy.
However, we could argue that this is just a symptom of a short industry… If my backpack breaks, even after 10 years, the company will replace it free of charge!
If there is ever a next successor to Blurays, for VR film or something, their DRM could be linked to a validation server. Once it’s always online what you describe becomes possible.
Currently Blurays and dvds are designed for offline playback, and are read only, so their licenses are always valid and perform no verification.