It does this by uploading firmware extensions to the drive's memory. What it DOES do, however, is disable bus encryption while the disc is in the drive.
It's not some "decryption be gone magic(tm)" like people seem to think it is. LibreDrive has *NOTHING* to do with decryption AT ALL. It involves making protected ISO's with a real UHD drive like the NS60 which AnyDVD can't do. There's one more thing LibreDrive can do but if you're using AnyDVD with a friendly drive it's not important. So by bypassing the MKB revocation, LibreDrive makes it so you can ALWAYS decrypt any title you have a title key for going forward. Programs like AnyDVD and MakeMKV would then need to be updated with a new host key that isn't revoked in order to decrypt ANY previous titles.including ones you have title keys for. This is significant because any compromised host keys would be revoked. If that disc has a newer MKB version then what's on the drive, then your drive's firmware is updated with the new MKB. You go out and buy the latest XYZ movie on UHD. To understand why I'll give you a scenario.
Awesome! It also ignores MKB revocation of host keys. As I recently learned, bus encryption is why official drives, as an example, can't be used as "friendly" drives. So what does this mean in practice? It means, for example, that a drive in LibreDrive mode ignores requests for bus encryption. What it DOES do, however, is bypass firmware restrictions. Again, LibreDrive does NOT mess with AACS at all. You still need a valid title key to decrypt it and AACS 2.1 adds other fun annoyances to the process.
It's not going to magically decrypt the content on a disc. LibreDrive does NOTHING to "bypass" AACS. "Testing a movie like FURY" is pointless. Ok, let's start with what LibreDrive is.and isn't.
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