PowerDVD private key

[ShadowFlare]

Originally Posted by dirio49

Yes, but only for newer disks. Old disk will still play fine.
and we will have to find a new key

From what I understand, old disks may still work as long as you do not play newer disks on any software player that supports revocation. However, the moment you play a newer disk on a player that supports revocation while using your drive, the older host private key will not work with the drive (I.E. the drive will no longer give out volume IDs when using the older host private key).

That is, if the player has to do something to tell the drive about the revocation. If the drive detects it by itself, then attempting to play a newer disc will result in the drive refusing to work with the older host private key.

Assuming that the player does need to tell the drive about the revocation, then an older host private key could theoretically be used in a non-revocation-compliant player even on newer discs and then only a newer device key or processing key would be needed. However, I'm sure AACS LA would not have left such a big hole open, meaning that the host key revocation is probably an automatic thing on the drives (for example, if the drive checks the host signature against something on the disc).

Of course, older discs will still be able to be decrypted, as the volume unique keys or volume IDs for the discs will have likely already been published.

[arnezami]

I believe this was already clear but I will explain it very clearly now:

When a new disc is inserted the drive is told not to give Volume IDs to the Software Player with the now found Private Key. It will remember this in its permanent memory.

This means that from that moment: old and new discs will not work anymore (because of the missing Volume ID). Until we find a new Private Key that is.

Of course if you store (or we let the program automatically store) all VUKs for all old discs you inserted before putting in the new disc in the drive these old discs can still be decrypted based on the VUKs.

The reason: VUKs are not revokable (as muslix64 already pointed out).

Thats why we always have to keep collecting VUKs. This is just an easier way and a program can do it automatically.

[SuperGoof]

Originally Posted by arnezami

When a new disc is inserted the drive is told not to give Volume IDs to the Software Player with the now found Private Key. It will remember this in its permanent memory.

This means that from that moment: old and new discs will not work anymore (because of the missing Volume ID). Until we find a new Private Key that is.

Hi arnezami,

Then how will you explain this:

http://forum.slysoft.com/showthread....5247#post15247

Slysoft developers say AnyDVD HD will not be affected by this scenario...

[blutach]

@supergoof

A one line answer with no technical theory to back it up? Just sounds like "trust me, I'm a salesman" to me. I suppose they are inferring that they'll find a kludge when the time comes (as they do for regular DVDs that AnyDVD has problems with).

Regards

[arnezami]

This is for those eagerly awaiting a proggy:

http://www.sendspace.com/file/g6vuw3

Its just a windows ported version of the program made by jx6bpm (which was written for linux). So it will "only" give you the Volume ID. But thats pretty cool by itself . (combining it with evdberg's mkb.exe program you can in fact already retrieve VUKs this way).

Please test it on different machines etc to see if there are any problems.

I will extend this program, clean up the source and will then release all. This will take at least several days given my available time.

Regards,

arnezami

[guile]

Originally Posted by arnezami

This is for those eagerly awaiting a proggy:

http://www.sendspace.com/file/g6vuw3

Its just a windows ported version of the program made by jx6bpm (which was written for linux). So it will "only" give you the Volume ID. But thats pretty cool by itself . (using evdberg's mkb.exe program you can in fact already retrieve VUKs this way).

Please test it on different machines etc to see if there are any problems.

I will extend this program, clean up the source and will then release all. This will take at least several days given my available time.

Regards,

arnezami

I really don't want to sound like a suck up Arnezami but you really are awesome bro. The wealth of knowledge you have brought to this forum (not to mention the time you have devoted) is truly amazing. Keep up the terrific work.

g

[blutach]

@guile -

@arnezami and everyone - for all your hard work.

Regards

[arnezami]

Thanks for all those kind words .

You guys just promise one thing: if something would ever happen to me (or for some reason I will go silent) you will double your own efforts and never stop at trying to defeat DRM!

Then will my mission would have really been worth it .

But I know you will .

My intend has always been to inspire other people to let the big (movie) industries know we will buy their stuff gladly. But we will not tolerate them to restrict our fair use rights and if they try we will embarras them while trying. Until they realize its pointless.

The really determined people are not the pirates: its the people who feel unjustified and will do everything in their power to regain their own fair use rights. Honest people will and should always fight unjust laws and policies.

Regards,

arnezami

[hoozdapimp]

Agreed. Your dedication and information you have provided are invaluable to the community.

I wonder how long it will be until someone releases an open sourced HD/BD player that uses these keys.

[melakai]

Originally Posted by hoozdapimp

Agreed. Your dedication and information you have provided are invaluable to the community.

I wonder how long it will be until someone releases an open sourced HD/BD player that uses these keys.

I'm eager to see an open source player as well - but I must admit, given the recent trouble with BackupHDDVD on Sourceforge, coupled with the high probability of new keys to be needed in the future (revocation is inevitable), it might be better to implement a program that uses a user-definable device key that wouldn't be distributed with the program itself.

Aside from this small point, I imagine development is about to pick back up.

[jokin]

Originally Posted by melakai

I'm eager to see an open source player as well - but I must admit, given the recent trouble with BackupHDDVD on Sourceforge, coupled with the high probability of new keys to be needed in the future (revocation is inevitable), it might be better to implement a program that uses a user-definable device key that wouldn't be distributed with the program itself.

Aside from this small point, I imagine development is about to pick back up.

I was thinking the same thing but with a user definable "device key" database that the program uses to test to see if a key works for the movie and if it does not then it trys the next one. This could also incorporate BackupHDDVD/BlRay into it under a tools tab to allow an all-in-one application.

[greath]

And yes, thank you arnezami for imparting your knowledge.

Corrected: Link does work. Too many pop ups and adverts to see the wood for the trees:-)

[blutach]

Link is fine here.

Regards

[HD Hell]

Congrats to arnezami and all here! Keep up the good work! I am now backing up my BDs and am very happy.

[arnezami]

Originally Posted by HD Hell

Congrats to arnezami and all here! Keep up the good work! I am now backing up my BDs and am very happy.

You're welcome .

(although I'm not sure how my program I released above can help you decrypt BDs. But you may not referring to that specifically. Or are you?)

[plasmacutter]

and if arnenzami makes the program to produce all keys?

either way.. this looks like one more step off the flow chart in the aacs topic ^^

[plasmacutter]

Originally Posted by melakai

given the recent trouble with BackupHDDVD on Sourceforge,

I remember the excuse they gave on the news sites i was reading..

apparently they clamed the keys being used were copywritten themselves? how the heck do you copyright a number?

[xyz987]

Originally Posted by plasmacutter

I remember the excuse they gave on the news sites i was reading..

apparently they clamed the keys being used were copywritten themselves? how the heck do you copyright a number?

Far good point ;-DDDDDD

They are trying to copyright random numbers ;-DDDDDD

[bcrabl]

Originally Posted by plasmacutter

I remember the excuse they gave on the news sites i was reading..

apparently they clamed the keys being used were copywritten themselves? how the heck do you copyright a number?

These numbers are secret so cannot be copyrighted. In order to copyright something you have to publish it. Check the copyright law, the copyright starts from the moment something is published.
And I bet no court would ever say that a random number can be copyrighted

[Fahzuu]

Originally Posted by blutach

@supergoof

A one line answer with no technical theory to back it up? Just sounds like "trust me, I'm a salesman" to me. I suppose they are inferring that they'll find a kludge when the time comes (as they do for regular DVDs that AnyDVD has problems with).

Regards

No, the way it sounds, AnyDVD is really not going to shut down, when the keys get revoked.
"No technical theory to back it up": they will do a damn to reveal their mechanisms, after all they do this for a living, there's no reason to make it easier for the competitors (which so far are nowhere to see)...