Cinavia Copyright Protection

Holy shit niggers:

https://en.wikipedia.org/wiki/Cinavia

The watermarking and steganography facility provided by Cinavia is designed to stay within the audio signal and to survive all common forms of audio transfer, including lossy data compression using discrete cosine transform, MP3, DTS, or Ogg Vorbis. It is designed to survive digital and analogue sound recording and reproduction via microphones, direct audio connections and broadcasting, and does so by using audio frequencies within the hearing range. It is monaural and not a multichannel codec.

o Only a single channel of audio is required to detect the watermark
o The watermark is able to survive re-recording through a microphone
o The watermark can be detected through "the production, duplication, distribution, broadcast, and consumer handling of recorded content"
o Different copies of otherwise identical works can be distinguished

Let's brainstorm ways to extract the waveform pattern from this!

>>14

e.g. secure conference telecommunication,

Exactly how would that work? You can't prevent a participant from recording what they hear, and if multiple participants collude they can make it extremely difficult to identify the exact source of the leak.

marking works for verifiability

gpg2 --detach-sign work

authentications systems

I have to admit that audio authentication (and using audio channels to transfer small amounts of data) does sound kind of cool and maybe even useful.

IOW, the problem is with DRM implementations on devices the user did not request, not the audiomark algorithm.

It's not [i]really[/i] DRM, it's just cryptography or digital locks. See https://www.gnu.org/philosophy/words-to-avoid.html#DigitalLocks

If it does get subverted into commodity devices without clear labeling/description, it would prove disastrous to everyone. The manufacturer would get lots of returns for non-functioning hardware, because some streams of data had the same signature as one of the DRM audio streams, thus locking the device is some fashion. The customer would obviously object, and return when something was not playing.

Even more fun than that; people would isolate an exact sample of the signal and then blast it through loudspeakers in public places, thus disrupting everyone's recording devices. The possibilities for abuse are endless.