>> BitTorrent, they can tell exactly which player it was ripped from.
> 
> With the understnading that a "player" in this context means "model 
> number" at least in the hardware players. I.e., they can tell it got 
> ripped by a Sony XYZ-1230 brand blu-ray player, not Joe's blu-ray player.
> 
> The idea is to identify it enough to black list the leaked keys, not to 
> catch the person who distributed the movie.

The article suggests that the system *is* supposed to be able to narrow 
it down to a specific machine or possibly a small number of such 
machines, not just a specific model.

Of course, it depends on whether the makers bother to fit each player 
with semi-unique keys or not... One commenter pointed out that hardware 
manufacturers have no vested interest in making DRM work. Only studios do.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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