These instructions run in something called a 'BD+ virtual machine', special software that Blu-ray players are required to include. After the stream files are encrypted using AACS encryption, they are further mangled randomly with instructions on how to repair the mangled files stored on the disc as special BD+ instructions. Thus playing newer discs propagates the revoked key lists out to all drives.īD+ is a second level of copy protection that is optional for pre-recorded Blu-ray discs. When a newer Blu-ray disc is inserted into an older drive, the drive is required to check the version of the 'Media Key Block' (MKB) on the disc and, if it is newer than the one the drive has internally, to copy over to permanent non-volatile memory the newer MKB. AACS includes a system by which the keys assigned to a particular player can be 'revoked' for future Blu-ray disc releases if it is determined that those keys have been compromised. It is based on Advanced Encryption Standard (AES), a robust 128-bit key encryption system developed by the US government. There are several different copy protections upon commercial Blu-ray discs: AACS encryption, BD+ protection, Cinavia protection, etc.ĪACS, short for Advanced Access Content System, has been widely used by companies like Disney, Intel, Microsoft, Panasonic, Warner Bros., IBM, Toshiba and Sony.

The purpose of Blu-ray copy protection is to protect Blu-ray content from being ripped, copied and played by unauthorized users. Commercial pre-recorded DVD and Blu-ray discs are typically protected with some form of copy protection. What are Blu-ray protection and region restrictionįirstly, let’s get into what Blu-ray protection and region restriction are before we learn how to rip copy protected Blu-ray movies.

Part 4: Comparison between Leawo Blu-ray Ripper and Handbrake.

Part 3: How to rip copy protected Blu-ray with Leawo Blu-ray ripper.Part 2: How to rip copy protected Blu-ray with Handbrake.Part 1: What are Blu-ray protection and region restriction.

Free blu ray ripper comparision