Feeds

HD DVD, Blu-ray copy protection cracked again

Different method, same result

Boost IT visibility and business value

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
Top Gun display for your CAR: Heads-up fighter pilot tech
Sadly Navdy kit doesn't include Sidewinder missile to blast traffic
Apple takes blade to 13-inch MacBook Pro with Retina display
Shaves price, not screen on mid-2014 model
FEAST YOUR EYES: Samsung's Galaxy Alpha has an 'entirely new appearance'
Wow, it looks like nothing else on the market, for sure
iPhone 6 flip tip slips in Aussie's clip: Apple's 'reversible USB' leaks
New plug not compatible with official Type-C, according to fresh rumors
TV transport tech, part 1: From server to sofa at the touch of a button
You won't believe how much goes into today's telly tech
YES YES YES! Apple patents mousy, pressure-sensing iVibrator
Fanbois prepare to experience the great Cupertin-O
NVIDIA claims first 64-bit ARMv8 SoC for Androids
Mile-High 'Denver' Tegra K1 successor said to rival PC performance
XBOX One will learn to play media from USB and DLNA sources
Hang on? Aren't those file formats you hardly ever see outside torrents?
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.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.