What exactly is BD+? An explanation:
Credit to arstechnia for this one:
"BD+ involves the player running a small virtual machine whenever a BD+ disc is inserted. The virtual machine is a small BD+ content code interpreter that includes 100 lines of code and 60 different instructions. The VM loads additional code from the Blu-ray disc, which can perform one of three functions:
Transform code, which is used to correct sections of video data which are deliberately corrupted on the video stream part of the disc. If hackers strip out only the video code itself, it will display corrupted sections without the application of transform code. This code may also be used to add digital watermarks to certain discs, which can then be used for forensic investigations of leaked copyrighted material.
Basic countermeasures, which can check a player that is known to have had its hardware hacked—for example, a patch to the drive's firmware—and detect and respond to this hack. This allows new discs to disable playback on standalone players that have been hacked, without having to revoke the license keys of the entire model or line of players.
Advanced countermeasures, which can load native code that runs directly on the Blu-ray player during the playback process. This code can do any number of things, but is designed to provide additional methods of protection should the basic countermeasures fail. "
And concerning ability to break this new protection layer:
"Once the disc is removed from the player, the virtual machine unloads and is no longer present in memory. This returns the Blu-ray player to its initial state, so that even if a machine fails to play a BD+ title, it should still (again, in theory) play previously-released Blu-ray titles that do not have BD+ protection.
According to the Blu-ray Disc Association (BDA), for hackers to successfully attack the BD+ system they would have to first extract the AACS keys (which has already been done quite successfully) and then overcome title-specific security code by reverse-engineering the BD+ virtual machine. While this last bit is definitely an additional challenge, it is by no means impossible."
This was extracted from this article:
Blu-ray content protection agency certifies BD+
Simply a tougher nut to crack -- and as soon as it is out every hacker worldwide will be trying to be the first to successfully crack this baby. My guess is this is why they want the players hooked up to the internet so a cracked copy can call 'home'. Also it does give the studio the ablility to change codes on every movie. Let the hunt begin.
Credit to arstechnia for this one:
"BD+ involves the player running a small virtual machine whenever a BD+ disc is inserted. The virtual machine is a small BD+ content code interpreter that includes 100 lines of code and 60 different instructions. The VM loads additional code from the Blu-ray disc, which can perform one of three functions:
Transform code, which is used to correct sections of video data which are deliberately corrupted on the video stream part of the disc. If hackers strip out only the video code itself, it will display corrupted sections without the application of transform code. This code may also be used to add digital watermarks to certain discs, which can then be used for forensic investigations of leaked copyrighted material.
Basic countermeasures, which can check a player that is known to have had its hardware hacked—for example, a patch to the drive's firmware—and detect and respond to this hack. This allows new discs to disable playback on standalone players that have been hacked, without having to revoke the license keys of the entire model or line of players.
Advanced countermeasures, which can load native code that runs directly on the Blu-ray player during the playback process. This code can do any number of things, but is designed to provide additional methods of protection should the basic countermeasures fail. "
And concerning ability to break this new protection layer:
"Once the disc is removed from the player, the virtual machine unloads and is no longer present in memory. This returns the Blu-ray player to its initial state, so that even if a machine fails to play a BD+ title, it should still (again, in theory) play previously-released Blu-ray titles that do not have BD+ protection.
According to the Blu-ray Disc Association (BDA), for hackers to successfully attack the BD+ system they would have to first extract the AACS keys (which has already been done quite successfully) and then overcome title-specific security code by reverse-engineering the BD+ virtual machine. While this last bit is definitely an additional challenge, it is by no means impossible."
This was extracted from this article:
Blu-ray content protection agency certifies BD+
Simply a tougher nut to crack -- and as soon as it is out every hacker worldwide will be trying to be the first to successfully crack this baby. My guess is this is why they want the players hooked up to the internet so a cracked copy can call 'home'. Also it does give the studio the ablility to change codes on every movie. Let the hunt begin.
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