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Why can't CSS-protected DVDs be copied?

Posted by David on 02/27/06 02:32

Well, I know they CAN be copied with the approrpiate software, but I am
just curious why that is even necessary. As far as I can tell, CSS just
encrypts the data, so that my copy (like the original) can only be played
on authorized DVD players. But when I try to do a whole disc copy with
Nero, it tells me "This DVD is copy-protected and canot be read". The only
thing I can think of is that Nero checks for the copy protection, and
willingly refuses to copy it. Or am I missing something?

Note that I am not asking for HOW to copy a DVD; I can manage that with all
of the decrypting utilities out there. I am just curious as to why, if I
just want to make a byte-for-byte copy of a DVD, Nero does not let me.

 

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