Saturday, November 28, 2015
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
NSA's Phone Surveillance Program Changes
Lenovo and Razer Partner to Make Gaming PCs
LG Display Makes Huge Investment in OLED Panels
Sony To Bring Remote Play Feature To PS4
MINIX NEO U1 Media Hub for Android Coming Next Week
Samsung Joins Audi’s Progressive SemiConductor Program
German ISPs May Block Music-sharing Sites: court
Study Says HTTPS Certificate and SSH Key Reuse Endangers Millions of Devices Worldwide
Active Discussions
How to back up a PS2 DL game
Copy a protected DVD?
roxio issues with xp pro
How to burn a backup copy of The Frozen Throne
Help make DVDInfoPro better with dvdinfomantis!!!
Copied dvd's say blank in computer only
menu making
Optiarc AD-7260S review
 Home > News > Optical Storage > AACS Ha...
Last 7 Days News : SU MO TU WE TH FR SA All News

Thursday, January 04, 2007
AACS Hacker Replies to Controversial Press Comments

Responding to the various comments on his ambitious work, the person behind the first software claimed to be capable of "defeating" the AACS content protection system of the HD DVD video discs strikes again.

Muslix64 posted last week on the Internet details of how he unlocked the encryption, known as the Advanced Access Content System, which prevents high-definition discs from illegal copying by restricting which devices can play them. The hacker released a software called "BackupHDDVD", which was reportedly capable of retrieving the encryption keys used by AACS and thus, allowing the decryption of the HD DVD movies. The program uses valid keys that have been extracted by an official HD DVD player.

The hacker added that the "BackupHDDVD" circumvention tool will work as long as insecure players exist. Muslix64 claims that these kind of players will always exist, allowing the extraction of valid volume (decryption) keys.

The first reactions from the various press sources indicated that the software would be useless unless it could bypass the key revocation system used in HD players. Of course this claim sounds reasonable, but Muslix64 has a different opinion.

"I did not break AACS, but I found a way to decrypt movies and I have bypassed all the revocation system," said Muslix64.

But what if those keys are revoked? Muslix64 said that "..volume key revocation" cannot be done. "If someone publishes only volume keys, there is no way to know from which player these keys where extracted, making the revocation system useless. They can do content revocation, but to revoke what? All movies before 2007?" Muslix64 added. "They can do player revocation, so I will just change the player I'm using," he added.

Muslix64 has currently managed to gain the attention of the online community. But he has also forced the companies behind the AACS encryption system to look into his hacking claim.

However, the AACS LA, the authority behind the HD DVD and Blu-ray system is expected to eventually get their hands on this program, look at the device keys and revoke them. "This would make that player unable to play new titles," said Muslix64. "But the author of this program can pre-extract a bunch of device keys from different players and release them, one at a time, when the previous one have been blacklisted," he added.

So according to Muslix64 the extraction of the volume key is enough to decrypt a protected movie. If this claim is correct, such keys could be massively extracted and circulated over the internet. Accessing the keys and making use of the decryption software that does online key recovery, would make disc backup an easy task for everyone.

But still, the hack can be blocked by adding different keys on every disk. Currently, the mastering houses use different keys for each movie title (title-specific security code). The Blu-Ray Association could partially have an answer to this, at least by preventing the replication of the Blu-Ray content on blank BD media. They have included the so-called "ROM-Mark" as an extra security feature on blank Blu-Ray discs. The ROM-Mark was designed to prevent the casual copying from BD-ROM to recordable media. It is an analog level mechanism for bit-by-bit copy protection. The ROM-Mark requires special machinery in the disc mastering process in order to be inserted on disc and thus, it could prevent malicious replications.

Reading these thoughts, someone might claim that the Blu-Ray camp could have some benefits over the rival HD DVD. We await the official response to these claims from Toshiba and Sony with great interest.

Details on Sprint Motorola Q Begin to Emerge        All News        New Faster e-GeForce 8800's with ACS³ Cooling
Corel Announces Ulead-Brand VideoStudio 10 Vista Update Pack     Optical Storage News      Sonic Launches Technology and IP Licensing Program for Secure DVD-on-Demand

Get RSS feed Easy Print E-Mail this Message

Related News
Memory-Tech Ready To Start Mass Production Of UHD Blu-ray Disc
Sony Unveils First 4K Ultra HD Discs
CyberLink Joins Ultra HD Blu-Ray Development Group
U.K. Physical Media Market To Keep Falling In Q3 2015
Sharp Showcases Ultra HD Blu-ray Recorder, 8K TV at CEATEC 2015
Panasonic DMR-UBZ1 Is The World's First BD Recorder With Ultra HD Blu-ray Playback Capability
Licensing Ultra HD Blu-ray Format To Start This Month
Blu-ray Disc Association Completes Ultra HD Blu-ray Specification
DVDFab Loses Legal Battle Against AACS LA
DIGISTOR Releases New Professional Grade Blu-ray Recordable Media
Blu-ray Players Could Install Malware
4K Blu-ray Gets a Name: Ultra HD Blu-ray

Most Popular News
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2015 - All rights reserved -
Privacy policy - Contact Us .