• Ghetto Covert Channels

    From warmfuzzy@700:100/0 to All on Fri Jul 6 21:47:04 2018
    Have you ever thought to yourself, "wouldn't it be cool if I could send
    someone a communication without it being detected and without having some super elite kit?" That will be described here.

    Tools:
    - $400-$1200 : computer
    - $FREE : morse code generator like Morse Cat or something similar
    - $400 Hi-Fi WAV/FLAC player
    - $FREE : Audacity audio editor
    - Specs of lower quality may still work with this
    - $140 Whole House FM Transmitter

    Here' how:
    - use the morse code generator to beep out the full message from your text, recording this to a WAV or FLAC file.
    - compress the wave so it compresses the audio in time, so a beepout that took 5 minutes can be shrunk to 10 seconds
    - copy this (uncompressed) to your HiFi FLAC/WAV player
    - plug your audio player into the Whole House Transmitter
    - turn on the Whole House Transmitter right upon nearing your destination
    - press play on the music player, transmitting for the 10 seconds only, maybe this will result being on air for up to 15-20 seconds but you should try to keep it to a minimum.
    - turn everything off and drive away

    You are now a Ghetto Homey-G kid with some mad skillz :)

    This is for educational purposes only, and if you do follow these
    instructions please don't transmit anything illegal in any way, shape, or
    form.

    This has the following benefits:
    - Its on the FM band so your signal can be lost in the great variety of stations - Its fast, this would quality as a "burst transmission"
    - its cheap and you don't have any government kit to expose your
    affiliations with
    - There's nothing illegal about this setup, apart from what you might transmit - the transmission is low enough power that it won't propagate very far, just far enough to reach a builing a few 20-40 meters away (depending on the
    antenna used for FM reception).
    - you could setup a time/place to do the transmission so that both you and
    your friend are near each other for a very short period of time.

    I hope that this makes you think just how easy a Ghetto Covert Channel can be to make and surprisingly, how completely legal it is. Once a person has mastered the description of the system above you can probably use this same setup more efficiently compressing a half hour or so into ten seconds.

    source: open source research

    --- Mystic BBS v1.12 A39 2018/04/21 (Linux/64)
    * Origin: Sp00knet Master Hub [PHATstar] (700:100/0)