All I know is that the music industry learned a long time ago DRM didn't work and wasn't worth it, and I can now buy MP3 files on any service, and play them on any device. And while I don't engage in movie piracy myself, I hope these pirates are successful in driving studios to that same point, where I can happily shell over $30 for a 4K file and use it how I want to.
Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
11–20 of 242 posts
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#12Another option is that somebody got ahold of some HDCP chips that fell off the back of a truck. There are Chinese companies (Explore Semi and friends) that make HDCP repeater chips with decryption / encryption capabilities. Those bad boys can take an HDCP-protected input stream and strip the encryption right off.
DCP controls chip sales very tightly in the US, but I imagine it's a practical impossibility in Shenzhen.
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#13Another option is that somebody got ahold of some HDCP chips that fell off the back of a truck. There are Chinese companies (Explore Semi and friends) that make HDCP repeater chips with decryption / encryption capabilities. Those bad boys can take an HDCP-protected input stream and strip the encryption right off. DCP controls chip sales very tightly in the US, but I imagine it's a practical impossibility in Shenzhen.
So it's a better quality Chinese knock off? We need a word for this.
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#14The DVD format in NTSC regions has 480 pixel vertical resolution. Even the half-century old NTSC spec has more vertical lines (525). I find it amazing that DVDs are still being sold.
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#15Another option is that somebody got ahold of some HDCP chips that fell off the back of a truck. There are Chinese companies (Explore Semi and friends) that make HDCP repeater chips with decryption / encryption capabilities. Those bad boys can take an HDCP-protected input stream and strip the encryption right off. DCP controls chip sales very tightly in the US, but I imagine it's a practical impossibility in Shenzhen.
So it's a better quality Chinese knock off? We need a word for this.
"consumer friendliness"
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#16Earlier quoted context omitted.
Time will tell. DCP has a lot of security built-in. Both in hardware (FIPS certified, anti-intrusion, etc.) and in Software -- encryption up the wazoo. Studios rely on a lot of insecure distribution and storage mechanisms for the big DCP file and instead rely heavily on the secure key exchange. If they have cracked DCP, somehow, then it is a major coup.
Presumably the studio sends a master to Okko and then Okko transcodes it into various formats for streaming. Imagine an insider sets the transcoder to output 4K H.264 and then leaks the resulting file. It sounds like encryption won't help here.
They wouldn't send a DCP stream for transcoding. DCP stream can only be decoded by the media block inside the projector and the output physically goes to the projector chip. The system has safe guards against physical intrusion. If you open the projector, it wipes all the keys. The level of paranoia in that thing is insane.
They keys only get programmed by the studios at manufacture time, and there is no servicing of the parts in the decode chain. The whole module has to be replaced.
I actually worked on a media block design about 10 years ago.
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#17Earlier quoted context omitted.
It sounds like no projectors are involved here.
Some of the projectors are connected to the DCP playback server via encrypted HD-SDI. The content is link-encrypted between the server and projector using Texas Instrument's "Cinelink" technology. If the TI "Enigma" module's private key was leaked, this would enable recording the plaintext SMPTE 292M video stream in real-time. The audio is un-encrypted obviously and easy to record, but it is watermarked so they would…
Jesus, they put so much effort into "encrypting" this data when it fundamentally needs to be available in a decrypted format for the users to watch it. At the end of the day, there's always the analog hole (or, more likely, the digital hole between the rendering chip and the MEMS array or LCD or whatever other mechanism lives inside the projector). No matter how many convoluted layers of encryption they throw at these things, there's always somewhere you can stick a camera or a few high-bandwidth digital signal analyzers and recover the content with at worst slightly degraded quality.
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#18I had to look it up. I won't post a link here but the file appears to be 38.06 GiB!
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#19Another option is that somebody got ahold of some HDCP chips that fell off the back of a truck. There are Chinese companies (Explore Semi and friends) that make HDCP repeater chips with decryption / encryption capabilities. Those bad boys can take an HDCP-protected input stream and strip the encryption right off. DCP controls chip sales very tightly in the US, but I imagine it's a practical impossibility in Shenzhen.
You don't even need go get the chips, devices like this strip the HDCP and turn the stream into MJPEG.
http://blog.danman.eu/reverse-engineering-lenkeng-hdmi-over-...
Here is their 4K device, don't know if it works like the HD device, but it would seem there is a fair chance it does.
http://www.lenkeng.net/Index/detail/id/147
You can buy these devices on eBay.
Re: Pirates Plunder 4K Hateful Eight, but Did They Crack DCP?
#20Earlier quoted context omitted.
Some of the projectors are connected to the DCP playback server via encrypted HD-SDI. The content is link-encrypted between the server and projector using Texas Instrument's "Cinelink" technology. If the TI "Enigma" module's private key was leaked, this would enable recording the plaintext SMPTE 292M video stream in real-time. The audio is un-encrypted obviously and easy to record, but it is watermarked so they would…
Jesus, they put so much effort into "encrypting" this data when it fundamentally needs to be available in a decrypted format for the users to watch it. At the end of the day, there's always the analog hole (or, more likely, the digital hole between the rendering chip and the MEMS array or LCD or whatever other mechanism lives inside the projector). No matter how many convoluted layers of encryption they throw at thes…
DCP isn't a consumer format (yet), it's only intended to protect the movie before it comes out on Bluray. And the encryption isn't convoluted at all, the private/public key system is essentially the same as what protects your information when you log into your bank's website.