Archive for the ‘AACS’ Category

AACS Remains Confident In Protecting HD DVD, Blu-ray Disc

June 1, 2007

“Efforts that began in December 2006 and continued through February 2007 lead to the discovery of the Processing Key used to encrypt high-definition media with the Advanced Access Content System. The work of a small hacking community created essentially a silver bullet that was able to defeat the copy protection of all HD DVD and Blu-ray Disc media on the market at that time.

The Advanced Access Content System Licensing Administration (AACS LA) acknowledged the effectiveness of the hack and began to enact measures to restore the integrity of its technology. Beginning May 22, which is most notably the release date of the Matrix trilogy on HD DVD, all high-definition titles shipped with Media Key Block (MKB) v3 – a new encryption key version that would render the previously discovered Processing Key obsolete.

Interestingly enough, the AACS’ updated protection measures appeared to be defeated by SlySoft, makers of AnyDVD HD software, before the new MKB versions officially hit streets. The AACS has yet to officially issue a statement and is current investigating the latest attack on the system, according to comments made by Richard E. Doherty, director of technology strategy at Microsoft, who is also actively involved with the AACS.”

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New HD DVD, Blu-ray Disc Copy Protection Defeated Before Release

May 18, 2007

“Beginning May 22, which is most notably the release date of the Matrix trilogy on HD DVD, all high-definition titles will shipping with Media Key Block (MKB) v3 – a new encryption key version that would render the previously discovered Processing Key obsolete.

“If a set of device keys is compromised in a way that threatens the integrity of the system, an updated MKB can be provided by the AACS LA that will cause a product with the compromised set of device keys to calculate a different key than is computed by the remaining compliant products,” as found written in AACS documentation. “In this way, the compromised device keys are ‘revoked’ by the new MKB.”

However, it appears that the AACS’ updated copy protection measures have already been circumvented even before the new software’s official release. SlySoft, developers of a software used to defeat the copy protections of DVD, HD DVD and Blu-ray Disc, have revealed that its latest version of AnyDVD HD is able to sidestep the new MKB from the AACS.”

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