FWD'd from a secure redirector, Raf sez: Someone wrote:
b) If it's played and recognized - one can trace your source (a CD, a tape of radio broadcast, whatever) and do a comparison. Then the file containing of all the LSBs is cryptanalyzed...
Actually, this is not really a problem. The odds of being able to resample, even using the same source and come up with the same byte string is infinitesmal. You've got chaos theory on your side here with massive "Sensitive Dependence on Initial Conditions." The exact byte string you got depends on: 1) volume 2) sampling device used 3) playback fidelity of your reproduction 4) the exact microsecond you clicked "record" (cause you'll be hitting different points in the same wave form) Just make sure to an application like Shredder or Flamefile to permanently erase your initial sample, and nobody should be able to tell. (unless they are aware of the trick beforehand) Rafial