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A comment on Zoom rolled their own encryption scheme, transmit keys through servers in China. Parent comment

Re:Zoom rolled their own encryption scheme, transmit keys th... by barrkel on Friday April 03, 2020 @10:06PM (#22775611)
Lossy compression reduces entropy, I'd expect fewer repeats and more of what looks like random data in any compression worth its salt. Thomas also mentioned AAC, not PCM. I agree on the silence, but it would come up as smaller packets, not repeated packets, IMO. And then we're back to timing analysis of speech.
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Re:Zoom rolled their own encryption scheme, transmit keys th... by killjoywashere on Friday April 03, 2020 @10:54PM (#22775846)
> Lossy compression reduces entropy, I'd expect fewer repeats and more of what looks like random data in any compression worth its salt.

Um, so, just to make sure I understand you, you're implying that lossy compression is not worth its salt? Because you will surely have more repeats in a lower entropy space.

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Re:Zoom rolled their own encryption scheme, transmit keys th... by tptacek on Saturday April 04, 2020 @12:06AM (#22776128)
You get essentially no repeats (collisions, more precisely) in the AAC streams I played with. Some block boundary headers; that's it.
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