The AACS decryption process for a protected disc by a licensed player goes through four stages: This file is called KEYDB.cfg and is accessed by libaacs in ~/.config/aacs. However, combined with a key database file, it is possible to use it to play Blu-ray discs that use the AACS standard. This project does not offer any key or certificate that could be used to decode encrypted copyrighted material. Libaacs is a research project from the VideoLAN developer team to implement the Advanced Access Content System specification, and distributed as an open-source library. Many articles and research papers describe it in detail at, or. The AACS specification and decryption process are publicly available at. Although the industry was able to revoke the first leaked decryption keys, new keys are regularly published in a cat and mouse play. Many decryption programs were made available, but the interest to Linux users was the capability of playing their discs - legally purchased - on their computers. In 2007, the AACS system was compromised and decryption keys were published on the Internet. Although most of commercial discs use AACS, a few of them additionally use BD+. Secondly, Blu-ray may also use another layer of protection: BD+. Firstly, the AACS standard uses a lot more complicated cryptographic process to protect the disc content, but also allows the industry to revoke compromised keys and distribute new keys through new discs. How it works Blu-ray DRMĬontrary to the DVD CSS, which was definitely compromised once the unique encryption key had been discovered, Blu-ray uses stronger DRM mechanisms, which makes it a lot more difficult to manage.

This is legal in most countries where interoperability allows this. Note: Since no commercial Blu-ray player software is available on their system, Linux users have to use open-source libraries capable of handling the DRM schemes that protect these disc contents.

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