Quietnet: a simple chat program using inaudible sounds

by
Anonymous Coward
in security on (#2SKC)
story imageImagine being able to chat with another user using what's in effect a modem program that transmits sounds at near ultrasonic frequencies. Now imagine your cat or dog being royally pissed off by your conversation.

The future is now. An anonymous Pipedotter wrote it to direct out attention to quietnet, a program that does just that. It is a simple chat program that works without Wifi or Bluetooth connections and won't show up in a pcap. You need a good pair of speakers to make it work: If you can clearly hear the send script working then your speakers may not be high quality enough to produce sounds in the near ultrasonic range.

Quietnet is dependant on pyaudio[1] and Numpy[2].

[1] http://people.csail.mit.edu/hubert/pyaudio/
[2] http://www.numpy.org/

The same Anonymous Coward notes: "Quietnet is just a toy! Take a look at minimodem[3] or gnuradio[4] if you need something robust."

[3] http://www.whence.com/minimodem/
[4] http://gnuradio.org/

[Ed. note: looks pretty interesting. Time to test out my cat's audio frequency sensitivity, that fuzzy bastard.]

Re: Re-Morse? (Score: 0)

by Anonymous Coward on 2014-09-19 21:17 (#2SMH)

Well that's why we appreciate sites like this one. We're communicating primarily via text, and that works just fine at anything much over 110 baud.

(I used to be one of the wackos constantly correcting people because I knew that 1200 bps modems were still 300 "baud". Or something like that.)

A lot of the territory has gotten rehashed as mobile computing has tried to grow up along the same struggling bandwidth path. SMS/Blackberry to 3G and 4G and WiFi, all to send dumb little 139 character tweetenings.
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