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Old 11th February 2007, 21:34   #121  |  Link
SBeaver
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Originally Posted by tonyp12 View Post
So now that we have a Processing key,
How time consuming would it be to guess the VID (instead of USB sniffing)?

For example a decrypter that says
"please wait, I'm trying 2million possible keys"
And do that in about 30 seconds.
That would take some time to figure out.
A good start would be if we could get more sniffed volume IDs and unencrypted Volume IDs from different discs so we can figure out the patterns in the keys, if there are any.
If you can guess the key down to 6 unknown bytes by jst knowing the manufacturer then it's will work, but the more unknown bytes the more impossible it gets.
Finding a pattern is the only way i think, and it will work as long as the discs follow these patterns.
As soon as they fall outside the box then you have to go sniff again.
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Old 11th February 2007, 21:44   #122  |  Link
Ishan
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I don't think there's any pattern, it seems it's different for each manufacturer.
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Old 11th February 2007, 21:53   #123  |  Link
SBeaver
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I don't think there's any pattern, it seems it's different for each manufacturer.
well that is a patterns, there is just a few manufacturers making all (edit: most) the discs anyway so if we know patterns for each that is enough.
not a perfect solution though.
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Old 11th February 2007, 21:54   #124  |  Link
madshi
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I rather think if the manufacturers/studios get notice of this thread they will probably make Volume IDs much more random than before. So I rather doubt that guessing will work in the future.
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Old 11th February 2007, 22:09   #125  |  Link
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It probably will take 2 months before we start seeing
any changes in the values they use for Processing Key and VID.

It would be cool to have a HDDVD-decrypter that can decrypt
any disc from the top10 manufactures before this date without memdump/sniffing/keydb.cfg

After that it will be a cat and mouse game.

Last edited by tonyp12; 11th February 2007 at 22:15.
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Old 11th February 2007, 22:19   #126  |  Link
evdberg
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Arnezami did great work, but he played out his cards much too soon ...
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Old 11th February 2007, 22:35   #127  |  Link
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Originally Posted by SBeaver View Post
You shouldn't give up on the device keys though, we should steal all the keys they have.
Rather poor choice of words. Nobody here is stealing anything - they are exercising their rights to play their legally bought material however they want to.

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Old 11th February 2007, 22:39   #128  |  Link
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@evdberg
What exactly do you mean about playing his cards to soon? Are you saying he should have waited until the VUK memdump search method was retired?

What would you have done?
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Old 11th February 2007, 23:15   #129  |  Link
SBeaver
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Rather poor choice of words. Nobody here is stealing anything - they are exercising their rights to play their legally bought material however they want to.

Regards
Well stealing is their definition of what people are doing.
Let's just say we are making copies of their keys just in case they lose them.
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Old 11th February 2007, 23:23   #130  |  Link
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@evdberg
What exactly do you mean about playing his cards to soon? Are you saying he should have waited until the VUK memdump search method was retired?
Definitely !

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What would you have done?
I can understand his enthusiasm (it clearly showed from his posts), he was on to something and I know how that feels. But since the current method is still not counteracted, it's better to keep it to yourself ... don't bring other people on ideas ... well, the rabbit is out of the hat now, we will see what happens, but my guess is that a very promising method is wasted now.
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Old 11th February 2007, 23:48   #131  |  Link
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I'm also thinking about doing a full explanation of the AACS protection system (or at least the subset-difference technique). But only if there is any demand for it .
Congratulations :-)

And yes, there is demand ;-)

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Old 12th February 2007, 00:08   #132  |  Link
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Originally Posted by evdberg View Post
I can understand his enthusiasm (it clearly showed from his posts), he was on to something and I know how that feels. But since the current method is still not counteracted, it's better to keep it to yourself ... don't bring other people on ideas ... well, the rabbit is out of the hat now, we will see what happens, but my guess is that a very promising method is wasted now.
May be they can revoke this Processing Key. So what?. In fact i want to see them revoking tons of keys. More easy will be to guest the Master Key.

Last edited by xyz987; 12th February 2007 at 01:02.
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Old 12th February 2007, 00:59   #133  |  Link
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Some of you are missing the true meaning of this compromise. If they revoke this processing key, we just take a player compatible with a new processing key, put in one of the titles that's already cracked, and go around in memory looking for the known key. We find it, insert a new title, look in the same place and we have a new processing key.
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Old 12th February 2007, 03:22   #134  |  Link
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That's what I was thinking, I just wasn't sure that it would be so simple to find the new key quickly.
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Old 12th February 2007, 04:53   #135  |  Link
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memory looking for the known key. We find it, insert a new title, look in the same place and we have a new processing key.
AACS-LA probably will revoke both windvd and powerdvd device keys,
give out new device and processing keys.
But only after the makers of the software players shows that
no keys whatsoever are in memory in plain view at any time.

The keys will only be in the CPU's register for a brief time.
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Old 12th February 2007, 04:56   #136  |  Link
Galileo2000
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Great job.

And yes, we DEMAND explanations!

BTW, I think I guessed your player all right.

You gave me a processing key in one of your posts.
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Old 12th February 2007, 09:42   #137  |  Link
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That's what I was thinking, I just wasn't sure that it would be so simple to find the new key quickly.
I am pretty sure that Cyberlink and InterVideo have to make sure it won't be as easy as it is now ... or worst case: their keys are revoked and they do not get new ones at all !
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Old 12th February 2007, 11:13   #138  |  Link
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Originally Posted by tonyp12 View Post
AACS-LA probably will revoke both windvd and powerdvd device keys,
give out new device and processing keys.
But only after the makers of the software players shows that
no keys whatsoever are in memory in plain view at any time.

The keys will only be in the CPU's register for a brief time.
This is probably what is going to happen, the only reason that the search-memdump-method have worked so far is that one HD-DVD application have a terrible AACS implementation. It's going to be much harder in the future.
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Old 12th February 2007, 11:37   #139  |  Link
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This is probably what is going to happen, the only reason that the search-memdump-method have worked so far is that one HD-DVD application have a terrible AACS implementation. It's going to be much harder in the future.
I really can't see them stopping us finding the VUK's . As we already know them for 150 titles.

We know what to look for as you just use the new "improved" software player to playback an old hddvd disc. Then we just search for the old vuks. They messed up now and we now know what we are looking for.
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Old 12th February 2007, 12:38   #140  |  Link
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We know what to look for as you just use the new "improved" software player to playback an old hddvd disc. Then we just search for the old vuks.
The new software players will do everything to hide the vuk's. A simple search for the keys won't work. The keys will be scrambled. They could also do several other things to hide the keys, but I won't give them any good ideas.
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