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A project I worked on in college was a "steganographic modem", transferring data in the audio spectrum by lacing a song being played with a signal, such that th
by unholiness 4y ago
A project I worked on in college was a "steganographic modem", transferring data in the audio spectrum by lacing a song being played with a signal, such that the signal in each frequency band would always be below the threshold that the human ear could tell the difference.
Even in a controlled setting the bitrate we achieved was very low, but for most songs it was enough to encode the lyrics. Seems quite useful until you remember both ends already need the original audio file in its entirety!
- exikyut 4y agoVery cool. I wonder if the source to this is still floating around anywhere?
- itintheory 4y ago> Seems quite useful until you remember both ends already need the original audio file in its entirety! That still seems quite useful. Steganography aims to obfuscate the presence of communication, not encrypt the data. You'd embed your ciphertext via the audio steganography. I can imagine this used for a dead drop by placing the encoded audio in a jukebox, or potentially even playing it over the radio/muzak system, if that isn't too lossy / the algorithm has enough error correction.