Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > General > Decrypting

Reply
 
Thread Tools Search this Thread Display Modes
Old 10th May 2012, 02:29   #1  |  Link
Zombiedeth
Registered User
 
Join Date: Apr 2012
Posts: 15
Thoughts and questions on Volume ID patches.

Seeing as some new drives can use the Volume ID patches more people will still be able to use aacskeys even when the host certificate is revoked. But what else?

VideoLan and other players could also benefit if libaacs used the AACSBYPASS code from aacskeys.

The one concern i have though will the industry start revoking bluray drives that have patches available?

If i understand correctly during the aacs authentication process player and drive hand over there certificate. If the drive receives a revoked host cert the process ends you don't get the VID. But in the case of the player say powerdvd when it receives a revoked drive certificate. From what i've read it tells you to update your firmware or something to that effect.

Now there seem to be some murky elements here if the drive is revoked would VideoLan still be able to play blurays or would the drive be toast until a new firmware was released?
Zombiedeth is offline   Reply With Quote
Old 14th May 2012, 15:27   #2  |  Link
ro-ee
Registered User
 
Join Date: Aug 2010
Posts: 34
It was my understanding, that the drive would continue working, but once a certain host certificate is revoked (the infos about revoked certificates are written on new Blu-ray Discs), this old certificate won't be accepted by the drive anymore. So you cannot playback old discs (unless you have stored the Volume ID elsewhere). A newer host certificate should be enough to perform again the authentication. Just as you can imagine Software A (e.g. WinDVD) uses an old host certificate. Then this HC gets revoked, and Software A cannot playback anymore on that drive. Software B (e.g. PowerDVD) has a different host certificate, and should play back BDs with the same drive just as before. And a software A' (e.g. a newer version of WinDVD with a new cert) should also be able to play again.

My thoughts about this could still be erroneous, as I didn't have a revoked certificate yet to test this theory.
ro-ee is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 15:49.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.