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Nathan wrote:

> I've decided to not offer an encryption solution to others.  I have
> several reasons.  I don't know U.S. law well enough.

You may well be right to worry about this. Phil Zimmerman was threatened
with prosecution for a long time over PGP, although I understand that US
export controls on cryptography have been relaxed since those days.

> The secrecy of the algorithm.  The secrecy of the key.

There is a fundamental flaw with relying on the secrecy of the algorithm.
No matter how cryptic it is someone will eventually crack it, possibly by
taking the shortcut of buying your product and reverse engineering it. The
moment it is cracked that factor of the system's strength has vanished
entirely. Of course if the algorithm is open the secrecy of the key is
everything. A compromised key, however, can be revoked and replaced at any
time.

As a matter of interest, and without giving away any details, I presume the
system you have developed is a public key / private key one? Secure
encryption using a very long truly random single key is trivial. The
problem then becomes one of distributing the key securely and controlling
access to the remote copies.

Dave...

=======================================================
The opinions expressed in this communication are my own and do not
necessarily reflect those of my employer.



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