A Spotter's Guide to AACS Keys

Peter Eckersley

Playlists: '24c3' videos starting here / related events

AACS is the DRM system used on HD-DVD and Blu-Ray discs. It is one of the most sophisticated DRM deployments to date. It includes around twelve different kinds of keys (in fact, even counting the different kinds of keys is non-trivial), three optional watermarking schemes, and four revocation mechanisms (for keys, hardware, players, and certain disc images).

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