The encryption used as part of this is 128-bit AES encryption. It stands for Advanced Access Content System (AACS) and the consortium is known as AACS Licensing Administrator. This encryption has been developed by a consortium of media industry leaders - Disney, Intel, Microsoft, Panasonic, Warner Bros., IBM, Toshiba, and Sony. Such protection is applied for pre-recorded disks and the same goes for other Blu-ray protections. The only files on which this protection is applied are the stream files and not the other files that are present in Blu-ray disks. This is a standard that the prerecorded Blu-ray comes with. No matter which kinds of copy protection, they can be applied to both Blu-rays and DVDs. Besides them, others may be also used but are less popular than them. There are five kinds of Blu-ray copy protections in detail.
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