Feeds

HD DVD, Blu-ray copy protection cracked again

Different method, same result

5 things you didn’t know about cloud backup

The Advanced Access Content System (AACS) has been cracked. A contributor to the Doom9 online forum has figured out how to extract the so-called Processing Key (PK) from an HD player, allowing any currently available HD DVD and Blu-ray Disc to be copied.

The trick, identified by a coder going by the handle Arnemazi, allows a Volume Unique Key (VUK) to be generated from a disc's Volume ID (VID). Usually, a player retrieves the disc's VID and uses the PK to create a VUK to decrypt the content.

Arnezami said he discovered the crack by scanning the system's memory and found the PK before it was erased after the generation of the VUK. He acquired a VID by monitoring traffic on his system's USB ports as the player software talked to an HD DVD drive.

As yet, there's no code to automate this procedure, so mass duplication of pre-recorded BDs and HD DVDs isn't yet possible, it would seem. The crack also relies on the non-random nature of the VIDs embedded in discs to date, a feature that makes them easier to find in memory and/or the USB traffic - or even to guess. New releases with random VIDs would make spotting the VID much harder, but the fixed data-structure of the VID doesn't help AACS' security.

Arnemazi's efforts come just over a month after a fellow Doom9 coder, Muslix64, discovered Title Keys for various HD DVDs in memory and used them to decrypt those discs for duplication. Backup tools for both HD DVD and BD that require the entry of these keys were published last month.

The essential guide to IT transformation

More from The Register

next story
So, Apple won't sell cheap kit? Prepare the iOS garden wall WRECKING BALL
It can throw the low cost race if it looks to the cloud
Samsung Gear S: Quick, LAUNCH IT – before Apple straps on iWatch
Full specs for wrist-mounted device here ... but who'll buy it?
Apple promises to lift Curse of the Drained iPhone 5 Battery
Have you tried turning it off and...? Never mind, here's a replacement
Now that's FIRE WIRE: HP recalls 6 MILLION burn-risk laptop cables
Right in the middle of Burning Mains Man week
HUGE iPAD? Maybe. HUGE ADVERTS? That's for SURE
Noo! Hand not big enough! Don't look at meee!
AMD unveils 'single purpose' graphics card for PC gamers and NO ONE else
Chip maker claims the Radeon R9 285 is 'best in its class'
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Advanced data protection for your virtualized environments
Find a natural fit for optimizing protection for the often resource-constrained data protection process found in virtual environments.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.