3 ms·
Besides the content of the leak, it’s interesting to think about the mechanics thereof. If I recall correctly, Zoom calls are fingerprinted ultra-sonically — I
by mkmk 5y ago
Besides the content of the leak, it’s interesting to think about the mechanics thereof. If I recall correctly, Zoom calls are fingerprinted ultra-sonically — I wonder if this poses a meaningful challenge when leaking a recording to the press, or if the fingerprinting can be easily defeated.
- klyrs 5y agoIf it's ultrasonic, a lowpass filter should do the job
- toomuchtodo 5y agoAny GitHub projects come to mind that’ll perform this transform?
- eigenvector 5y agoAny audio encoder - lame is an open source option for mp3 - will have low pass filters. Most encoders will filter inaudible frequencies to improve compression even if not told to, but there are explicit parameters you can set.
- vlovich123 5y agoAssuming the call is intact, who is able to reverse the fingerprint?
- mkmk 5y agoThis article, from 2019, suggests that it is Zoom itself that would do the tracing. https://venturebeat.com/2019/01/22/zoom-is-bringing-ultrasonic-signatures-to-business-calls-to-deter-leaks/ https://venturebeat.com/2019/01/22/zoom-is-bringing-ultrason... Perhaps as an enterprise service?