TELECOM Digest OnLine - Sorted: AACS Decryption Code Released

AACS Decryption Code Released

Monty Solomon (
Wed, 24 Jan 2007 22:13:14 -0500

AACS Decryption Code Released
by Ed Felten

Decryption software for AACS, the scheme used to encrypt content on
both next-gen DVD systems (HD-DVD and Blu-ray), was released recently
by an anonymous programmer called Muslix. His software, called
BackupHDDVD, is now available online. As shipped, it can decrypt
HD-DVDs (according to its author), but it could easily be adapted to
decrypt Blu-ray discs.

Commentary has been all over the map, with some calling this a
non-event and others seeing the death of AACS. Alex Halderman and I
have been thinking about this question, and we believe the right view
is that the software isn't a big deal by itself, but it is the first
step in the meltdown of AACS. We'll explain why in a series of blog
posts over the next several days.

Today I'll explain how the existing technology works: how AACS
encrypts the content on a disc, and what the BackupHDDVD software

AACS: Extracting and Using Keys

AACS: Blacklisting, Oracles, and Traitor Tracing

AACS: Game Theory of Blacklisting

AACS: Title Keys Start Leaking

AACS: Sequence Keys and Tracing

AACS: Modeling the Battle

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