Re:Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
by tomerv on Wednesday September 07, 2016 @08:03AM
(#12442597)
There is just one encrypted copy, with one key. But that key has many copies, each encrypted with a different copy. The device takes its private key, and uses it to acquire the "master" key, which is then used to decrypt the media.
Of course, every movie release has its own "master" key.
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Re:Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
by sp332 on Wednesday September 07, 2016 @10:47AM
(#12443818)
Even AACS on bluray discs can have multiple different copies of some parts of the video to watermark different sets of device keys. I know footage from theaters can be watermarked too, so I'd be very surprised if this distribution method didn't also have some kind of identification.