[The_ByteMaster]

Originally Posted by He-Man

Here's an article discussing Volume Variant Unique Keys, maybe this will be to some help?
AACS: Sequence Keys and Tracing: http://www.freedom-to-tinker.com/?p=1110

From the article:
"The effect of this is that the movie will look slightly different, depending on which player was used to decrypt it."

So depending on your player, Han will shoot first, or not?

I'm only kidding of course, it stands to reason the differences wouldn't be noticable to the human eye. This will just result in a cat-and-mouse game between Fair Use people who compromise players (nab required decryption keys from memory) and the content providers. It doesn't really matter if you only get updates say a couple of times per year, as long as those updates work with all currently available discs.

Once a future version of BackupHDDVD encounters a P-EVOB which needs SKB processing it perhaps will just consult the file SKBDB.cfg to get the required keys.

For now the BackupHDDVD modders can just check for the presence of AACS/SKB.AACS and AACS/SKF.AACS: "no SKBF and no SKF shall be present on a HD DVD-Video ROM medium which contains no P-EVOB with Sequence Key Sections."