From: nobody@shell.portal.com
Date: Tue, 8 Feb 94 02:26:36 PST
To: cypherpunks@toad.com
Subject: Magic Money -> Chaum Cash
Message-ID: <199402081025.CAA20709@jobe.shell.portal.com>
MIME-Version: 1.0
Content-Type: text/plain


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Ok, let's try this one more time... Based on Eric's long and mathematical
explanation, which I did not fully understand and was therefore convinced
by, I have changed the program to use full Chaum cash. It takes the 16-byte
random number, takes its MD5, and stores the MD5 in the coin. The coin is
now a triple (id,e,mpi) and the bank never sees id when blind-signing the
coin, thus preserving anonymity.

I sent this new version to csn.org as mgmny10c.zip. I haven't had a chance
to update the manual or the comments in the code, but it does seem to work.
At least, I was able to mint coins and cycle them through the server a few
times, so the basic coin cycle seems to work. Please check it out, on
machines of both endians, and let me know what happens.

                                                 Pr0duct Cypher

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