BD+
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BD+ is the DRM scheme embedded in every Blu-ray Disc.
BD+ is the name given to an experimental Digital Rights Management (DRM) mechanism that will be included on BD-ROM discs. The Blu-ray Disc Association was forced into providing this extra layer of protection following pressure from Fox. The HD DVD group did not agree to provide Fox with such a DRM over AACS. The fears about BD+ surround the possibility of studios like Fox theoretically being given the power to restrict Mandatory Managed Copy (a system that allows users to make digital copies of movies and send them around a home network).
BD+ allows for dynamic encryption schemes, meaning that if the protection were to be cracked, manufacturers could simply change the encryption scheme on new discs, so one single crack could not open up all BD-ROM discs. This is, of course a major advantage over the Content Scrambling System (CSS) protection used on DVD discs which was cracked years ago. All old and new DVDs containing CSS can be ripped from the disc to a HDD, or software is available to simply remove CSS on-the-fly.
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