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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