the obvous problem is that a lot of ppl have a PC-with-DVD, and thus if they can read it once, they can take a backup once, and lo and behold, they have a non-degrading copy. But another question is if it wouldn't be possible to re-coat the DVDs ?
Some clever hacker just might find out that smearing your DVD with a mix of hairspray turtle-vax and paint will create a permanent coating that works just fine...
On the legal side, I suppose it is possible to form a licence-agreement that says something like: You've only paid to watch this film 5 (five) times. Please sign on the dotted line.
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That would, ofcourse, be much more restrictive than a rental-movie, but then schemes that have only "common sense" as their security model, tends to change once you try to implement them digitally.
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the obvous problem is that a lot of ppl have a PC-with-DVD, and thus if they can read it once, they can take a backup once, and lo and behold, they have a non-degrading copy. But another question is if it wouldn't be possible to re-coat the DVDs ?
Some clever hacker just might find out that smearing your DVD with a mix of hairspray turtle-vax and paint will create a permanent coating that works just fine ...
On the legal side, I suppose it is possible to form a licence-agreement that says something like: You've only paid to watch this film 5 (five) times. Please sign on the dotted line.
That would, ofcourse, be much more restrictive than a rental-movie, but then schemes that have only "common sense" as their security model, tends to change once you try to implement them digitally.