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The comments so far are just about HDCP, Blu-Ray and playback difficulties. The paste however contains the key matrix used to encrypt and decrypt the digital v
by js4all 16y ago
The comments so far are just about HDCP, Blu-Ray and playback difficulties.
The paste however contains the key matrix used to encrypt and decrypt the digital video signal. If this is valid, every transmission between a HDCP-secured playback device and the display can be decrypted, thus rendering every other encryption method, used in the playback chain, useless, including AACS and BD+.
This is serious, because the keys for AACS can be revoked, if compromised. HDCP keys however can't be revoked.
- bdonlan 16y agoHDCP keys can be revoked. It just won't do any good - this matrix lets you create _new_ keys, just as valid as all pre-existing ones.
- nitrogen 16y agoIt doesn't completely render BD+ useless, as BD+ can be used to watermark the video signal according to the player model (and hypothetically other variables, like location, IP address, or player serial number). So, to avoid identification, pirates would need to crack BD+, or combine the output from multiple players to obscure the watermarking. Another problem with cracking the transport instead of the storage medium, is that to rip from HDMI you have to play the movie at normal speed, while ripping straight from disc can be done much faster.
- js4all 16y agoI agree with the second point. Regarding on-the-fly watermarking, I see the hypothetical use, but current watermarking algorithms are to complex for BD+. An interesting idea though.