From: Steve Schear
The CSS keys are in an area of the disc that cannot be written to by any DVD recorder. Only the DVD-pressing machines can create CSS-protected discs. I think not. Anyone can buy Authoring disks and PC-DVD recorders are openly available to record such disks. Both cost more than General Purpose disks.
Pioneer DVR-S201
The DVR-S201 is the world's first DVD-R drive to support the recently released 4.7GB media of DVD-R Book Ver 2.0 for Authoring. The DVR-S201 drive is designed for authoring DVD titles that utilize the full capacity of mass-produced DVD-ROM or DVD-Video media. A completed DVD-R disc is ideal to use a Press Cutting Master Disc. The DVR-S201 drive is also specially designed for authoring applications offering added convenience for creating DVD titles and content with increased efficiency.
An authoring disc can be played like a regular disc and it has the extra information that is needed to create a CSS disc, but it does not actually have the CSS information in the place where standard DVD players will read it. To create an actual CSS-encrypted disc you need to have a glass master created and DVDs pressed. See: http://www.pioneerelectronics.com/Pioneer/Files/DVDR_whitepaper.pdf "It should be noted, however, that CSS encryption cannot be used with either type of DVD-R media."