Thursday, May 28, 2015
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
TSMC To Move To 10nm Production in 2016
Sony to Acquire Optical Archive As It Enters The Data Center Storage Market
SDK Starts to Mass-Produce Transparent Conductive Ink for Electronics
Lenovo Outlines Its Vision For Future Connected Devices at Global Tech World Conference
Avago To Buy Broadcom: report
FCC Moves To Protect Consumers From Robocalls
Software Bug Causes iPhone Crashes
Google Cardboard VR Gadget And New Android Version Among I/O Highlights
Active Discussions
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
cdrw trouble
 Home > News > Optical Storage > DVD Aud...
Last 7 Days News : SU MO TU WE TH FR SA All News

Thursday, July 07, 2005
DVD Audio Encryption Scheme Cracked


We all know that encryption and DRM are the keys to a secure future, because they work flawlessly and keep away the miscreants. Or, not. Copy Protection for Pre-Recorded Media (CPPM for short) has been cracked.

Following on the heels of the famous cracking of CSS, which is used to encrypt and region encode DVDs, the industry moved to CPPM for securing audio on DVD audio discs. And, as we have all come to expect, someone has found a workaround.

Defeating the encryption requires patching InterVideo's WinDVD versions 5, 6, or 7, which then allows a user to direct audio data directly to unprotected .WAV files. The crack involves using the application's built-in DVD audio decryption support (you've got to decrypt it sooner or later), but it changes output to allow for storing the data stream in a recognizable format. That said, the crack isn't entirely complete.

The only caveat is that DVD-Audio's Verance digital watermarking, embedded in the audio signal itself, cannot be removed. The Verance watermark contains seventy-two bits of data comprising four CCI (copy control information) bits and eight usage identifier bits every fifteen seconds plus sixty content identifier bits every thirty seconds – if a DVD-Audio player detects that an embedded watermark does not match that of a specific disc (in other words if ripped DVD-Audio content is burnt to a blank DVD-R disc using an authoring program such as DiscWelder BRONZE), the machine will halt playback after thirty seconds.

CPPM is a bit more robust than previous solutions, and future content protected by CPPM could have the playability by InterVideo's WinDVD versions 5, 6 or 7 revoked, making the hack no longer usable. That said, all of the content released so far has been cracked, and we can expect to see further cracks in the future.

From arsTechnica



Previous
Next
Sharp Develops Dual-Layer Super-Resolution Optical Disc        All News        Philips introduces SolidBurn for optimal writing on all recordable DVD media
Sharp Develops Dual-Layer Super-Resolution Optical Disc     Optical Storage News      Philips introduces SolidBurn for optimal writing on all recordable DVD media

Source Link Get RSS feed Easy Print E-Mail this Message

Related News
Panasonic To Close DVD-player Factory In Slovakia
Optical Disc Sales Down
DVD And Blu-ray Discs Remain Popular in Britain
DVD CCA Ends Litigation with Kaleidescape
DVD Writer and Media Market Keeps Shrinking
DVD And Blu-ray Discs Remain Preferred Sources of Video Content
DVD FLLC To Run 2013 Market Inspection Tests
DVD6C Lowers Royalty Rates for DVD Read-only Discs
DVD6C Files Lawsuit Against CDI Media
DVD6C Terminates Patent License Agreement with Canadian Premium Disc
Deals, DVDs and Blu-ray Discs Were a Hit With Shoppers Over Black Friday Weekend
CD, DVD Recordable Media Market Down

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 .