what is CSS
Nowadays, more and more movie-copy software come up with the popularity of movies. As we know, most of the movie discs are protected by CSS which makes a lot of trouble on copy movie discs. What is CSS?
Content Scramble System (CSS) is digital right management scheme used on almost all commercially produced DVD-Video discs. It utilizes a proprietary 40-bit stream cipher algorithm.
The purpose of CSS is twofold. First and foremost, it prevents byte-for-byte copies of an MPEG stream from being playable since such copies will not include the key that are hidden on the lead-in acrea of the restricted DVD disc. Second, it provides a reason for manufacturers to make compliant devices, since SCC scrambled disks will not play on noncompliant devices. Anyone wishing to build compliant devices must obtain a license, which contains requirement that the rest of the DRM system be implemented.