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Originally Posted by Phil^
They can trace it back to an encoder if the watermarking is left in yes.
the idea is then that they can disable that encoding string for ppl, and all movies from them wont work anymore.
Now - Imagine if that encoder happened to be the same one the movie industry uses and encoded a heck of a lot of films for them.
( or more likely, just claimed it was )
They wouldnt dare disable it since it would end up making a lot of their own movies unusable and would just serve to piss people off.
( note distinction between encoder and player, the encoder MAKES the movie, the player just plays it)
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Ahah, the link is found.
Self Protecting Digital Content
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"When a pirate makes a copy of a film encoded as SPDC, the output file is cryptographically bound to a set of player decryption keys. So it is easy when looking at a pirated work on a peer to peer network, or any copies found on copied DVDs, to identify which player made those copies," said Laren "When the content owner sends out any further content it can contain on it a revocation of just the player that was used to make a pirated copy."
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Just shows that there are solutions such as this around that can be used if necessary. While the encryption may be broken - making it less attractive to do so and more effort may be sufficient to cut down on piracy. And if not, i'm sure they'll bring in more technology
