4 ms·
The irony is if you're geeky enough to connect your computer up to a big display to watch movies etc, you're certainly geeky enough to circumvent a little popup
by axod 18y ago
The irony is if you're geeky enough to connect your computer up to a big display to watch movies etc, you're certainly geeky enough to circumvent a little popup warning.
- nailer 18y agoHDCP is implemented in the video card. The output is encrypted and the HDCP certified device decrypts. However, ultimately the OS either enforces it or doesn't. And the OS has been pretty weak so far. Addenda: I'm not talking about iTunes, I'm talking about the OS, which iTunes uses to display video.
- m_eiman 18y agoNo need to hack iTunes, just download the movie in a DRM-free format. I've heard that there are places on the Net that has things like that, something with pirates and a bay? But sure, if the Blu-Ray replacement happens to have a working protection system they might finally pull it off. Too bad for them that the last part of the delivery chain will always be unprotected, unless they find a way to put HDCP in Eye 1.0 wetware.
- nailer 18y agoSure, but the pirated HD version had to remove the DRM in the first place (eg, some Blu Ray titles require HDCP, which you have to remove to rip it).
- m_eiman 18y agoYup. But figuring out how to do it will probably take longer than the download!
- nailer 18y agoAye, but someone's figured it out, hence making the download possible. It's might seem like a chicken and egg discussion, but it isn't: the crack needs to come first. But once one person cracks it, the content is available for everyone else.
- jbert 18y ago> Too bad for them that the last part of the delivery chain will always be unprotected, unless they find a way to put HDCP in Eye 1.0 wetware That won't help you record it if there is sufficient pressure on the small number of manafacturers of recording devices: I would imagine it would be possible to create something like a EURion for video and audio. http://en.wikipedia.org/wiki/EURion_constellation http://en.wikipedia.org/wiki/EURion_constellation
- jcl 18y agoI think it would actually be a lot harder to apply something like EURion to video or audio, because of user expectations. Video and audio recorders are not expected to duplicate an existing artifact but to make a record, something you usually only get one chance to make. A EURion measure would be prone to abuse, breaking the user expectation that the given event had been correctly recorded. The obvious example: What if a guy robbed a bank wearing a EURion t-shirt? None of the security cameras would record him, unless you had some exception for security cameras. And once you have an exception for security cameras, do you have an exception for, say, home security cameras? If so, anyone will be able to get a circumventing camera; if not, a lot of people will be upset.
- jbert 18y agoI don't know how varied the possible DRM policies are, but it would seem possible to implement a 'generation counter' for DRM'd media which would restrict the number of copies. e.g. the output of a video camera could be tagged with "allow 3 copies only". Each DRM-aware copy produced would decrement the # of allowed copies. The copied file would have an allowed-count of 0. If a EURion-like image triggered this mode on the camera then that would probably be sufficient for manufacturers to avoid liability, but still serve to effectively close the "analog hole" (not really analog, but hey). Yes, it all does seem unlikely. But so does tagging of printer output with yellow dots and EURion, and DRM in general. http://en.wikipedia.org/wiki/Printer_steganography http://en.wikipedia.org/wiki/Printer_steganography
- marvin 18y ago
- newt0311 18y agoSwitch to linux and the OS stops caring entirely.
- tptacek 18y agoAnd so does everyone else, because Linux won't play the content we're talking about.
- nailer 18y agoYes it does. You could play HD-DVD media on Linux - I have personally done it. I'm relatively sure you may play Blu-Ray too. It's just like playing WMV or WMA - all you need is a codec - plus a tool to handle the DRM, which, as we're all aware, is inevitably created the day after the DRM is released.
- tptacek 18y agoThere's still no permanent break for Blu Ray BD+; there are still titles that Slysoft can't play, and no evidence that the next Macrovision refresh won't stall Slysoft for months. You are drastically oversimplifying.
- nailer 18y agoBD+ was broken last week, as I understand. The VM that implements both BD+ content and BD+ encryption schemes can be emulated. What's left?
- wmf 18y agoI think the VM is emulated only well enough to run existing bytecode samples. If a studio can discover a bytecode sequence that executes differently on the licensed and unlicensed VMs, they can use that code in future movies.
- tptacek 18y agoBochs can emulate X86 quite well. Does Bochs itself bypass X86 copy protection code? There's two obstacles: (1) The VM emulation has to be perfect, and the Slysoft and open source emulation is reverse engineered. Reactos is Win32 reversed from one of the easiest platforms in the industry to reverse, and it's not perfect; BD+ was designed to be hard to reverse. (2) Once the VM is perfect, so that the next 20 revs of Macrovision's protection code can't just go peek at some dark corner of the VM that Slysoft didn't know about, you still have to use that emulator to beat every successive program that Macrovision chooses to run on it. A major challenge for SPDC, the underlying technology behind BD+, was that it had to be implemented autonomously by numerous consumer electronics companies, most of whom have no expertise in the areas of CS (compilers, virtual machine runtimes, content protection) that BD+ plays in. I expect it to get better over time, not worse.
- tptacek 18y agoOS X is weaker in this regard than Vista; Vista won't play protected content if the kernel includes unsigned code. But OS X will get there.