Feeds

HD DVD, Blu-ray copy protection cracked again

Different method, same result

Beginner's guide to SSL certificates

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.

Internet Security Threat Report 2014

More from The Register

next story
NOKIA - Not FINNished yet! BEHOLD the somewhat DULL MYSTERY DEVICE!
N1 mini-'slab to plop into crowded pond next year
Heyyy! NICE e-bracelet you've got there ... SHAME if someone were to SUBPOENA it
Court pops open cans of worms and whup-ass in Fitbit case
SLURP! Flick your TONGUE around our LOLLIPOP – Google
Android 5 is coming – IF you're lucky enough to have the right gadget
Fujitsu CTO: We'll be 3D-printing tech execs in 15 years
Fleshy techie disses network neutrality, helmet-less motorcyclists
Space Commanders rebel as Elite:Dangerous kills offline mode
Frontier cops an epic kicking in its own forums ahead of December revival
VINYL is BACK and you can thank Sonos for that
The format that wouldn’t die is officially in remission
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Top 5 reasons to deploy VMware with Tegile
Data demand and the rise of virtualization is challenging IT teams to deliver storage performance, scalability and capacity that can keep up, while maximizing efficiency.