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The AACS LA confirmed on January 26 that the title keys on certain HD DVDs had been published without authorization. [29] Doom9.org forum user arnezami found and published the "09 F9" AACS processing key on February 11: Nothing was hacked, cracked or even reverse-engineered btw: I only had to watch the "show" in my own memory.
The AACS Licensing Authority (LA) assigns a series of 253 unique cryptographic keys to device manufacturers. When an AACS protected disc is manufactured, a series of up to 64 keys called title keys are generated and the video content on the disc is encrypted using these keys.
AACS uses cryptography to control and restrict the use of digital media. It encrypts content under one or more title keys using the Advanced Encryption Standard (AES). Title keys are decrypted using a media key (encoded in a Media Key Block) and the Volume ID of the media (e.g., a physical serial number embedded on a pre-recorded disc).
The discs have a volume identifier called VID , the Encrypted Title Key and a decryption key (Media Key Block). Process to obtain the Media key, from the MKB and the Device Keys. The players have some keys, according to each model, called Device Keys, which are granted by the AACS organization. In the reproduction moment, one of these keys ...
The AACS’s cryptographic key management procedure uses Device Keys to decrypt one or more elements of a Media Key Block (MKB), in order to extract a secret Media Key (Km). A MKB is located on the physical support (the disc) together with the content of the disc encrypted.
Cyberlink, the company which sells the PowerDVD player, stated that their software could not have been used as part of these exploits. [19]On April 16, 2007, the AACS consortium announced that it had revoked the Device Keys used by both Cyberlink PowerDVD and InterVideo WinDVD, and patches were made available for users which provided uncompromised encryption keys and better security for the keys.
The Free Speech Flag is a symbol of personal liberty used to promote freedom of speech.Designed by artist John Marcotte, the flag and its colors correspond to a cryptographic key which enabled users to copy HD DVDs and Blu-ray Discs.
The Media Key Block (MKB) is one of the keys included inside the copying protection system AACS. This system is used to prevent Blu-ray and HD DVD formats from being copied. The system was developed by companies from the film industry and the electronics industry including IBM , Intel , Microsoft , Matsushita (Panasonic), Sony , Toshiba , The ...