Tag: AACS
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Slysoft Commercializes Next-Gen DVD Circumvention
We’ve been following, off and on, the steady meltdown of AACS, the encryption scheme used in HD-DVD and Blu-ray, the next-generation DVD systems. By this point, Hollywood has released four generations of AACS-encoded discs, each encrypted with different secret keys; and the popular circumvention tools can still decrypt them all. The industry is stuck on…
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AACS Updated, Broken Again
[Other posts in this series] We predicted in past posts that AACS, the encryption system intended to protect HD-DVD and Blu-ray movies, would suffer a gradual meltdown from its inability to respond quickly enough to attacks. Like most DRM, AACS depends on the secrecy of encryption keys built into hardware and software players. An attacker…
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You Can Own an Integer Too — Get Yours Here
Remember last week’s kerfuffle over whether the movie industry could own random 128-bit numbers? (If not, here’s some background: 1, 2, 3) Now, thanks to our newly developed VirtualLandGrab technology, you can own a 128-bit integer of your very own. Here’s how we do it. First, we generate a fresh pseudorandom integer, just for you.…
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Why the 09ers Are So Upset
The user revolt at Digg and elsewhere, over attempts to take down the now-famous “09 F9 …” number, is now all over the press. (Background: 1, 2) Many non-techies, including some reporters, wonder why users care so much about this. What is it about “09F9…” that makes people willing to defend it by making T-shirts,…
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Digg Users Revolt Over AACS Key
I wrote yesterday about efforts by AACS LA, the entity that controls the AACS copy protection system used in HD-DVD and Blu-ray discs, to stop people from republishing a sixteen-byte cryptographic key that can unlock most existing discs. Much of the action took place at Digg, a site that aggregates Web page recommendations from many…
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AACS Plays Whack-a-Mole with Extracted Key
The people who control AACS, the copy protection technology used on HD-DVD and Blu-ray discs, are apparently trying to shut down websites that publish a certain 128-bit integer. The number is apparently a “processing key” used in AACS. Together with a suitable computer program, the key allows the decryption of video content on most existing…
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Software HD-DVD/Blu-ray Players Updated
The central authority that runs AACS (the anticopying/DRM system used on commercial HD-DVD and Blu-ray discs) announced [April 6, 2007 item] last week the reissue of some software players that can play the discs, “[i]n response to attacks against certain PC-based applications”. The affected applications include WinDVD and probably others. Recall that analysts had previously…
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AACS: Slow Start on Traitor Tracing
[Previous posts in this series: 1, 2, 3, 4, 5, 6, 7, 8.] Alex wrote on Thursday about the next step in the breakdown of AACS, the encryption scheme used on next-gen DVD discs (HD-DVD and Blu-ray): last week a person named Arnezami discovered and published a processing key that apparently can be used to…
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AACS: A Tale of Three Keys
[Previous posts in this series: 1, 2, 3, 4, 5, 6, 7.] This week brings further developments in the gradual meltdown of AACS (the encryption scheme used for HD-DVD and Blu-Ray discs). Last Sunday, a member of the Doom9 forum, writing under the pseudonym Arnezami, managed to extract a “processing key” from an HD-DVD player…
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AACS: Modeling the Battle
[Posts in this series: 1, 2, 3, 4, 5, 6, 7.] By this point in our series on AACS (the encryption scheme used in HD-DVD and Blu-ray) it should be clear that AACS creates a nontrivial strategic game between the AACS central authority (representing the movie studios) and the attackers who want to defeat AACS.…