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posted by
Fnord666
on Sunday September 17 2017, @11:48AM
from the can-it-descramble-the-adults-on-Peanuts? dept.
from the can-it-descramble-the-adults-on-Peanuts? dept.
Voice inversion is a primitive method of rendering speech unintelligible to prevent eavesdropping of radio or telephone calls. I wrote about some simple ways to reverse it in a previous post. I've since written a software tool, deinvert (on GitHub), that does all this for us. It can also descramble a slightly more advanced scrambling method called split-band inversion. Let's see how that happens behind the scenes.
http://www.windytan.com/2017/09/descrambling-split-band-voice-inversion.html
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Descrambling Split-Band Voice Inversion With Deinvert
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(Score: 2, Interesting) by Anonymous Coward on Sunday September 17 2017, @05:01PM (1 child)
Several decades ago some electronics enthusiast's magazine (Popular Electronics??) described a simple hardware system to mix audio from a local radio broadcast with your spoken voice in real-time; the resulting "scrambled" signal could be decoded with corresponding hardware, providing the receipient could also tune to same radio broadcast. Scrambled audio was inductively coupled to a telephone handset for "secure" conversations.
(Score: 0) by Anonymous Coward on Monday September 18 2017, @08:43PM
yeah, mine went eeeeeeEEEEE CRSSSSHSHSHSSHSHSH
and then I got a login prompt!