Re: Real-time sound cyphering algorithm

Astier Anisse wrote:
> I'am willing to find a simple algorithm to cypher a sound:
> I need the cyphered sound to be audible, but not understandable,
> and that we can decypher it from a recorded sound
[...]

Crypto has gone digital. Ciphering entirely in the analog domain
has a dreadful security record, and the modern crypto literature
essentially ignores it. For what is available, try Googling
"speech scrambling".

The way we would approach this today is to digitize the sound,
compress (with an audio-specific coder), encrypt, code for
forward error correction, and modulate onto an audio carrier.
This group should be able to help with the encrypt step, and
people here might know something about the others, but each of
the steps is now reasonably well studied on its own.

-- 
--Bryan