Audio Steganography : The art of hiding secrets within earshot (part 2 of 2)

Audio Steganography Methods

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Apollo 11 moonwalk unconverted slow-scan television image [Source]
pip install pysstv 
python -m pysstv /path/to/image.jpg /path/to/audio.wav
“secret” image
image converted to SSTV audio
  • This plugin produces a single-side-band modulated signal with a suppressed carrier.
  • The sample rate must be more than double the frequency of the modulation carrier frequency. So, for example, if you wish to use a carrier frequency of 17500 Hz, then the sample rate of the secret audio must be more than 35000 Hz. You can use the “Tracks menu > Resample” option in Audacity, if this condition is not satisfied for your secret audio.
  • Most of the speakers and headphones reliably transmit audio up to 20,000 Hz. This is one reason why in my example, I will use a near-ultrasound carrier frequency range (17.5 kHz).
  • Make sure that when you export the processed audio, the sampling rate in “Project rate” is more than double the carrier frequency.
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Research Scientist II at Alexa AI, Amazon USA. Checkout my blog: https://blog.reachsumit.com/

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Sumit Kumar Arora

Sumit Kumar Arora

Research Scientist II at Alexa AI, Amazon USA. Checkout my blog: https://blog.reachsumit.com/

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