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Is it possible to rip movie straight from cinema? (lemmy.ml)

submitted 3 months ago by [email protected] to c/[email protected]

36 comments fedilink hide all child comments

As in title, i'm just wondering whether it is possible to rip movie from cinema if one has got unsupervised access to cinema's hardware. Maybe someone did that? I'm not talking about caming, i'm talking about making a digital copy of premiere material.

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[–] [email protected] 36 points 3 months ago* (last edited 3 months ago) (1 children)

Last time I looked at the topic (several years ago in a now deleted reddit post); someone had posted info on the projector system.

The media is delivered on a battery backed up rack-mount pc with proprietary connectors and a dozen anti-tamper switches in the case. If it detects meddling; it wipes itself. You're not likely to grab a copy from there.

As the other commenter mentioned; the projector and media are heavily protected with DRM, encrypting the stream all the way up to the projector itself. You can pull an audio feed off the sound board; but you're stuck with a camera for video.

[–] [email protected] 14 points 3 months ago (1 children)

Now i wonder what it does when battery dies, whether it wipes itself or not. And where it stores it's keys, in TPM or in RAM or where.

[–] [email protected] 9 points 3 months ago (1 children)

Pretty sure the media itself is stored in ram, or similar volatile memory; so it wipes automatically on powerloss.

[–] [email protected] 4 points 3 months ago (1 children)

Friends in other comments suggested that the file is 100-300gb size, it's quite a lot of RAM if you asked me, but not much for a harddrive. If i were to design this machnie would store the movie heavily encrypted on a harddisk and store keys in RAM. Sb ealier mentioned you need special keys from special compamy to decrypt it so it would be doubly encrypted, one key stored in RAM and another inputed by technican. Ofc if i were to design this i would try to make it piratable by introducing some "accidential" vuln.

[–] [email protected] 2 points 3 months ago

Too many engineers involved, there wouldn't be a single point of failure like that by design.