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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 i
by tomerv 10y ago
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.
- sp332 10y agoEven 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.