Posted by Allan on 12/23/48 11:27

On Fri, 23 Sep 2005 22:14:22 -0700, "Alpha" <none@none.net> wrote:

>You are naive. The codes will change hourly according to a complex
>algorithm. There will be no 'the code' to crack, and the code algorithm is
>changeable immediately in case a crack is found. In fact, if it detects a
>problem, the entire machine is disabled.
>
>This is air tight.
>

Content-Scrambling System (CSS) is an encryption system used on some
DVDs. It uses a weak, proprietary 40-bit encryption stream cipher
algorithm. The system was introduced circa 1996.

The CSS key sets are licensed to manufactors who incorporate them into
products such as DVD drives, DVD players and DVD movie releases. Most
DVD players are equipped with a CSS Decryption module. CSS key is a
collective term for authentication key, disc key, player key, title
key, second disk key set, and/or encrypted key.

In October 1999, the algorithm was reverse engineered by Jon Johansen
and DeCSS was released. The CSS algorithm was soon revealed to be
easily susceptible to a brute force attack. The weakness of the
protection is due to US government crypto-export regulations, apart
from being an example of the trusted client problem.







"Arguing with anonymous strangers on the Internet is a sucker's game
because they almost always turn out to be -- or to be indistinguishable from
-- self-righteous sixteen-year-olds possessing infinite amounts of free time."
- Neil Stephenson, _Cryptonomicon_

[Back to original message]