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Author Topic: Keys dvd.keys.tar.gz  (Read 3253 times)

garg_art2002

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Keys dvd.keys.tar.gz
« on: August 21, 2009, 02:16:34 am »
In trying to recover a broken Linux MCE, I noticed that there are many files <movie_name>.dvd.keys.tar.gz

What are these? And what is the significance of their loss?

How can they be recreated from <movie_name>.dvd file which is about 7GB in size?

Many thanks.
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merkur2k

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Re: Keys dvd.keys.tar.gz
« Reply #1 on: August 21, 2009, 05:08:58 am »
they are the css encryption keys for the dvd. as far as i know, there is no way to recover them without having the original dvd. it would kinda defeat the purpose if they were embedded in the iso ;)
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krys

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Re: Keys dvd.keys.tar.gz
« Reply #2 on: August 21, 2009, 05:36:20 pm »
It was my impression that just playing the movie file would create the new key, no need for the original disk. As long as you have libdvdcss2 installed.
-Krys
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tschak909

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Re: Keys dvd.keys.tar.gz
« Reply #3 on: August 21, 2009, 06:22:34 pm »
the keys file is literally just a cache of the decoded keys from libdvdcss, so that it doesn't have to decrypt them again from the disk, resulting in slightly faster playback.

-Thom
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