Editing Blu-Ray Ultra-HD DRM (section)

==Software requirements==
The decryption process involves several steps, with the first being the authentication of the player and the optical drive to ensure that both possess valid certificates. These certificates can be revoked arbitrarily at any time by AACS LA, rendering devices or software unusable with restricted media.

Developers can obtain specifications for AACS 2.0 and 2.1 only after signing a license agreement<ref>[https://aacsla.com/wp-content/uploads/2022/09/AACS1-Adopter-Agrmt-220519-v1.1-FINAL_review-only.pdf "AACS License Agreement"] - aacscla.com - accessed 2025-01-30</ref>. This agreement stipulates that any software implementation must be closed-source and, as stated in section 7.6.4.1 of the agreement, requires the use of obfuscation techniques designed to effectively disguise and hinder attempts to uncover the methods used. This raises privacy concerns because decryption keys cannot be included with the software. Instead, the software must connect to the internet to retrieve the keys from servers. If these servers were to shut down, there would be no way to obtain the decryption keys, making the discs permanently unplayable.