Hi Doug,

Yes, I'd heard of this before. Our mission, this time, it authenticate without obscuring the message content. So, chaffing probably won't be part of the picture.

    Thanks

    Bruce


On 03/12/2013 12:56 PM, Douglas Quagliana wrote:
Hi Bruce,

Just to muddy the waters... there is a way to preserve confidentiality
without
using any encryption, but I don't know if this satisfies things like
HIPPA. See

http://people.csail.mit.edu/rivest/Chaffing.txt

  >From the above article:

In summary, we have introduced a new technique for confidentiality,
called ``chaffing and winnowing''.  This technique can provide
excellent confidentiality of message contents without involving
encryption or steganography.
Douglas


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