Originally posted by Willo
I'm in the market for a DVD Burner and I want the most feature packed, the one that will beat al the Copy Protection Software
Developed by the so-called "4C" group - Intel, IBM, Matsushita and Toshiba - in co-operation with the Copy Protection Technical Working Group (CPTWG), the Content Protection System Architecture (CPSA) provides an overall framework for content protection across the entire DVD family. The CPSA architecture has been designed to accommodate the major existing content protection technologies as well as allowing the integration of new technologies as they emerge. Through close collaboration between the relevant groups, it has also been designed to be consistent with and avoid duplication of copy protection measures emanating from the Secure Digital Music Initiative.
The CPSA architecture is comprehensive, spanning analogue and digital, audio and video, consumer electronics and PC systems and physical and electronic distribution techniques. A comprehensive content protection system depends on both technologies and policies. CPSA specifies the use of two key technologies - watermarking and encryption - to together provide a means to enforce content protection policies.
Watermarking is a technology that allows content management information (CMI) to be embedded in content in a way that is transparent to the end-user of that content and robust against the information being either removed or altered in any way. Sometimes referred to as â€œusage rulesâ€, CMI indicates the conditions and requirements constraining use of the content. It stays with the content regardless of the contentâ€™s analogue or digital representation. Watermarking does not, in and of itself, protect the content. Rather, the protection comes from compliant devices responding appropriately to manage the content in accordance with the CMI. Such protection is realised only if there is some means to compel devices to be compliant. That means encryption.
Encryption is a way of scrambling digital content so that it is unusable (not recognisable) unless it is first descrambled (decrypted). To get the necessary intellectual property to be able to decrypt the content, a license is required. That license contract specifies requirements to manage the content according to its CMI.
CSS - Content Scrambling System (the copy protection system used for DVD media. It is implemented in chipsets inside the DVD player): Method for protecting DVD-Video content via authentication and content scrambling developed primarily by Matsushita and Toshiba. Descrambling requires a pair of keys. One of these is unique to the disc, while the other is unique to the MPEG-2 file being descrambled. The keys are stored on the lead-in area of the disc, which can only read by compliant drives. Anyone wishing to build compliant devices must obtain a license, which contains the requirement that the rest of the copy-protection system be implemented.
DeCSS was used as a guide by programmers around the world to create hundreds of equivalent programs, some merely to demonstrate the trivial ease with which the system could be bypassed, and others to implement an open source DVD player (the licensing restrictions on CSS would have made it impossible for an open source implementation through official channels). Since no commercial DVD drivers have been made available for some open source operating systems, users of those operating systems require an open source implementation simply in order to play a legally purchased DVD using their legally purchased hardware and software. But, once the unencrypted source video is available in digital form, it can be copied without degradation; thus it is also possible to use DeCSS as part of a scheme to copy DVD videos to another medium with no loss of quality
To emphasize - it is impossible to encrypt digital information so that it cannot be copied precisely by any device capable of reading and writing the medium in question.