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Work Around for New DVD Format Protections
An anonymous reader writes "For the new Blu-ray and HD-DVD formats, Hollywood implemented a complete copy protection scheme; almost everything has to be encrypted and authenticated. Despite the crypto-stuff in Advanced Access Content System and High Bandwidth Digital Content Protection, they left the backdoor wide open — they forgot about the PrintScreen button. Using this function you can create exact digital copies of a film picture-by-picture and reassemble them into a stream."
thats quite a bit of work to copy a movie
This copy protection quagmire (we need to come up with a withdrawal plan)... it creates problems in other ways on other fronts.
Consider the long discussed issues in general with DRM and DRM's interference with easy adoption of new (and really potentially very cool) technology for consumers. This has been discussed to death on slashdot as well as other forums -- and remains one of the foremost threats to the success of HD in any
What may be less obvious is what starts to happen when these tiny holes appear in the digital dike, and the industry discovers they're gaping holes, and the patching begins, to the detriment of other accepted technology.
In the case of this described "hole", a screen print? This becomes the DRM's worst nightmare? If they succeed in lobbying the PC industry and others and get this hole blocked, all of a sudden a long-accepted practice, i.e., screen printing, becomes suspect and may even be taken away as an option because it is potentially used for pirating.
Don't discount the possibility this could happen. A few years ago all may have pooh-poohed the idea as preposterous because computers just plain old didn't have the horse power and storage to pull this kind of feat off. Today they do. And if someone does start pirating DVDs this way it would be predictable the MPAA could go after that technique, maybe successfully.
Unintended consequences. I would find it highly objectionable to see the capabilities of my computers to expand and my ability (or permission) to use those capabilities diminished.
Hollywood didn't implement squat.
They browbeat/bribed the companies that developed the software to implement it.
Splitting hairs, maybe, but Hollywood would have trouble implementing a flush toilet.
Skivvy Niner? Email me!
HEY! Look left just ONE MORE TIME!
1 - Shift key - DMCA circumvention
2 - Print Screen - DMCA circunvention
Let's hope they don't take our entire keyboard to protect their stuff from the thieves...
how long until
Printscreen?
Give me a break, somebody please send a HD-DVD/Blu-ray drive to DVD Jon so he can start doing his stuff.
Not with a beowulf cluster!
(sorry, I couldn't NOT do it.)
Skivvy Niner? Email me!
HEY! Look left just ONE MORE TIME!
Of course you don't hit print screen yourself, you get a macro package to do it for you and automate the whole thing.
Cheers,
Ian
If you spill soda in the exact spot right under the Print Screen button, it becomes much easier.
To make "other" copies is too troublesome. As always, real pirates will use the means they always have. They will work "off hours" at DVD publishing sites making uncounted copies indistinguishable from the counted copies. They will have the production equipment in their homes to make exact duplicates.
This is not about stopping piracy because these measures to nothing to address the two primary methods. What it does thrwart is casual consumer copying to better ensure that the consumers will buy multiple copies of the same stuff.
What I am saying is not new and has been repeated since the creation of the first DVD format.
Or I can get one of these
Now was not the time to splatter this information all over the world. If they had waited for wider deployment, this hole could have been kept wedged open as closing it on hundreds of thousands of clients wouldn't have been terribly practical.
Remember would be DVD-Jons, if you find DRM holes in new media tech SHUT YOUR YAP UNTIL EVERYBODY AND HIS DOG HAS BOUGHT SOME. THEN RELEASE THE INFO. When you do release the information, do so complete with "mom friendly" utilities and use warez "spreaders" to be sure everybody and his dog can start using it right away. This also complicates shutting the hole in various social and technical ways.
I'm just throwing out ideas here, but could a pirate with decent art skills redraw every frame of the movie on paper? A few thousand pieces of computer paper would be all that's needed. Staple it all together and BAM, sell on the subway corner for 2 bucks a pop. Piracy will never end!
If O2 is good, O3 must be 1.5 times better!
So the new copy protection sheme is supposed to keep professinal pirates (the guys that copy the movie and then sell th ecopies in large quantities) from gaining a copy? Gimme a break!
And it is supposed to be a hurdle to those "release groups" (the guys that compete with each other to be the fastest to release a movie to the p2p networks)? Yeah, right!
This hole (and there will be others) is another prove that there is no protection against those two groups. They will simply find another way.
But it puts a major obstacle in the way of paying customers that just want to watch movies. The movie studios don't realize it because there is no pressure from an alternative. That is also called a monopoly. And who is going to break it up? The movie industry and the record industry both seem to need a little "help" to get some competition back into their respective markets.
DirectX recorders exist, primarily used for recording videos in games. I'm pretty sure most DVD player apps use the same directx layer, and so could easily be recorded by such a program. This is just an idea off the top of my head.
Result: watch for the MPAA to start outlawing your favorite DirectX recorders in the near future. Seems they will always find it easier to prosecute the loopholes than to fix their own stuff.
Just set your DVD software to play frame-by-frame. The rest is taken care of by the automated script. Sure, it may take a couple of attempts, but once you have the formula down, ripping an entire DVD movie should not take more than 4x or 5x the normal duration of the movie. Just let your computer run all night and you can have a brand new DiVX in the morning.
Now, what I'd like to know is: how do you rip the soundtrack off those uber-protected DVD? Hook the DVD player to an MP3 recorder? Or do you use one of the software that pretends to be a valid sound card?
The right to offend is far more important than the right not to be offended. (Rowan Atkinson)
Check this out:
Using my 733t hax0r sk1llz, I can use my EYES to COPY the movie to my BRAIN, where I can remember it OVER and OVER again -- for FREE!
Eat THAT, MPAA!
High-Bandwidth Digital Content Protection (HDCP) "protects" DVI & HDMI interfaces but for this to work on a regular PC then the OS has to be in on the deal as well, right? So if a drive and video card support the devil that is HDCP, does this "back door" work if the OS is in on the HDCP? I would venture a "no" on that one.
Taking print screens is a weak solution, but a solution nonetheless. All it takes is one person to have the patience or scripting skills to automate this for a copy to hit the internet. One. That's the problem with DRM in that it may deter most people but to be totally effective it requires determent of everyone. Feeding millions of individual frames to an encoder is not beyond some people, I'm sure. Especially since hollywood raised the stakes.
If this is a back door, then it's one of those miniature clown doors. When someone figures out a way to completely strip out AACS (like what was done with CSS) then we can call AACS hacked and laugh again at the never-winable battle that is DRM.
DRM is unwinable because you have to give the decryption key to the user so that they can use the product. If you don't give them the key then they can't use it. So DRM gives the encrypted data and the decryption key to the user every time.
:wq
They took my tilde, now I cannot cheat in Half Life 2! NOOOOOOO! But honestly, no one's gonna printscreen an entire movie.
The concept of taking full-blown movies of your desktop is very old and is used a lot for computer training programs, it would be incredibly simple for one of those recording programs to record the video and audio of a playing movie and save it without the copy protection.
Anything that appears on my computer screen I can copy - even streaming video.
It is not that hard of thing to do, even if you have to write the code yourself.
My Sig indicates the end of the comment I posted.
It would be a lot of work, if you did it manually. The print screen button is really just a proof of concept idea. Remember that the device is a computer and they excell at repetition.
For example, it wouldn't be too hard to write a DirectX driver for a virtual display device that simply passes every frame it sees into a filter for recording. Same should work for audio, really. Just take the inbound stream and stash it somehwere. As long as you've got the bandwidth inside the machine to move the data and the space to store it, why not?
This is why MS is pushing so hard for that "driver verification" thing. User created drivers can bypass the DRM just before the media gets pushed out to the hardware. The Windows box simply isn't built for DRM level trust at all points in a broadcast. Yet, anyways. It's still possible to break the chain somewhere and extract content. I'm guessing that'll always be the case too, at least for a good long while. Only way to get around that with what we have today would be if MS started selling PCs that are welded shut.
Weaselmancer
rediculous.
This *is* a backdoor. The digital data is in the frame buffer, but cannot be extracted (programs that are not trusted cannot be run). The Print Screen function is trusted, and so can run even with end-to-end crypto. The Print Screen function has access to the entire frame buffer. I don't know of another way to do this -- this one is actually brilliant.
And, Print Screen can be scripted. The player can ALSO be "scripted". As in, pause, and single step ("consumer" features). As to the speed of such a utility -- I would estimate that the re-encode process for a typical movie would take around 400 minutes (on a "typical" high end PC, see next paragraph for the amount of data involved). Ripping the audio track is more difficult (especially in full 5.1+ glory), but the technology for that is known. Time for that is real-time. Pulling a figure out of my ass, I would think a usable rip would take 800 minutes.
It's not "2 trillion" screen captures. It is a lot of data, though. At maximum resolution (1920x1080p) its 2 million pixels per frame. At 24bpp, that's 672 GB per hour (108,000 frames). The data HAS to be jammed through an encoder right away. This, of course, introduces new artifacts (its not going to be a "perfect" first generation copy). But its still going to be better than DVD quality.
I believe that the keys for this software will be revoked, and the current users (if any) "upgraded".
The point that this attack makes is that "DRM" is actually rather laughable. Your audience needs the decrypt keys, and yet can't be trusted with the decrypt keys... It just isn't stable.
Ratboy.
Just another "Cubible(sic) Joe" 2 17 3061
Wait, HD DVD and BluRay aren't cracked yet? They've been out for weeks... Come on, you lazy hackers!
There will be an image quality degradation since it's the decompressed stream that is being copied, and it will have to be recompressed to get it back to a size that will fit on HD-DVD/Blu-Ray. Therefore, this isn't equivalent to a direct copy of the compressed data stream.
What you should have the right to do is make a backup copy for safekeeping, or for viewing on a device that doesn't have a DVD drive/player (notebook PC, iPod, whatever).
Don't forget having the ability to rip certain parts of the movie to disk to edit and play with, use for presentations (PowerPoint, etc...), and just plain old make parodies of. Making amateur derivative works without charging for them is beneficial to society as a whole. Just look at youtube.com to see countless examples. The real problem is that user-created content is starting to steal the spotlight from Big Media, and DRM is one way to lock out the non-conglomerates from competing.
I'm sorry, but am i the only one who thinks all these codecs, DRM tools and other garbage are just a waste of time?
There are already many ways to get a clean WAV file from anything playing on your computer, drivers that hook into the direct sound and just copy what ever is there. Or how about just burning the CD from iTunes, then ripping it with a freeware tool?
What these XXAA need to do is just understand that if you can watch/listen to it, it can be copied. That's it! Make people want to buy the product for other reasons. I own sooo many different seasons of different television shows because i like to have the boxes sitting on display. Anywho, is this really news? another attempt to create "un-copy-able" media failed?
thanks for listening
**end rant**
I don't mind losing a pile of $0.05 cheapo blank CDs to kids, it just goes with the territory, but to lose a $50 game is another matter.
One might say... It's a thousand times worse!
Buh-dum-cha!
This is only vaguely ontopic, but are there limits to how many people can "own" a DVD (or the license to watch the DVD, or whatever)?
I ask because if my wife and I purchase a DVD with our collective funds, am I the owner? Is she the owner? Or are we both the owner?
What if 100 people all contributed a nickel and bought a $5 VHS tape of a movie? Can they each make a copy of it? Do you have to own majority share in the VHS to make a copy?
What if 10 million people each paid $1 and all agreed to purchase a certain bundle of films and music that was valued at $10,000,000? Clearly SOMEONE must own it, but who?
Are there any laws about this? I can't seem to find any online (I think my searching skills are for crap on this one), but it seems like a very interesting question.
But if the PC's Blu-ray Disc or HD-DVD player detects that the operating system is running virtualized, or if you have your computer's Trusted Platform Module turned off, then the software will decode at 960x540 at best or refuse to run at worst.