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How is this possible? (thelemmy.club)
submitted 5 months ago* by to c/piracy@lemmy.dbzer0.com
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I downloaded the movie after seeing it in theatre to once again enjoy it from the comfort of my home. Seeing 2160p, I thought it's going to be a webcam rip but the title says webrip. Where is this leaked from that has Dolby Vision on a movie still in theatre?

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[–] 48 points 5 months ago (13 children)

I'm really curious about the sanitation process. About the methods used to identify each copy, it has to be one of those cases of security by obscurity. I think it is a fascinating topic that I know nothing about.

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  • [–] 46 points 5 months ago* (2 children)

    IIRC digital cinema files are usually DRM locked in a special format and are also imperceptibly watermarked somewhere throughout the video. They're distributed to cinemas usually on physical hard drives/SSD's. I don't know anything about the security details other than that, off to YouTube it is!

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  • [–] 26 points 5 months ago (4 children)

    Same, it makes me think about Reality Winner being caught because they knew which printer the documents came from.

    The pages from the NSA's printers came with invisible tracking dots. This is a common feature in modern printers for forensics investigations

    https://www.cnet.com/news/privacy/reality-winner-nsa-leak-russian-hacking-printer-tracking-dots/

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  • [–] 17 points 5 months ago (3 children)

    It's basically impossible to detect well-designed steganography (invisible watermark) unless you have access to the algorithm that writes or reads it, or multiple comparable copies of the media.

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  • [–] 14 points 5 months ago (2 children)

    That is what makes it so fascinating to me. Do they work with the original files? Is it possible to capture the decoded data at some point before the projector?Is the watermark still present there?

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