[42335] in Cypherpunks
Re: How can e-cash, even on-line cleared, protect payee identity?
daemon@ATHENA.MIT.EDU (Jiri Baum)
Thu Oct 26 00:44:30 1995
From: Jiri Baum <jirib@sweeney.cs.monash.edu.au>
To: hfinney@shell.portal.com (Hal)
Date: Thu, 26 Oct 1995 14:24:13 +1000 (EST)
Cc: cypherpunks@toad.com
In-Reply-To: <199510241425.HAA06922@jobe.shell.portal.com> from "Hal" at Oct 24, 95 07:25:58 am
Reply-To: jirib@cs.monash.edu.au
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Hello Hal <hfinney@shell.portal.com>
and cypherpunks@toad.com
H wrote:
> Jiri Baum <jirib@sweeney.cs.monash.edu.au> writes:
...
> >An interesting question is whether Bob and Nick can now collude to
> >expose Alice. Therefore Alice would at least want to verify that the
...
>
> I don't think they can. All Bob sees is his own blinded coin, and the
...
What I meant is, are there any proto-coins that will show through
a blinding? (Mathematically special values like fixed points.)
> However, the timing is a problem. Bob knows _when_ Alice communicated
...
So it is.
What you'd really want is for Alice to pay for the new coins in ecash.
I'm wondering whether a "coin-changer" would be easier or harder to
set up than a "bank" (from regulatory point of view).
After all, for e-cash you don't really need accounts; you just need:
- verify coins (coin-changer) ie ecash->ecash
- buy coins (join the system) ie cash->ecash
- sell coins (redeem) ie ecash->cash
Any cyberspace banks can be completely separate from the ecash issuer.
Jiri
- --
If you want an answer, please mail to <jirib@cs.monash.edu.au>.
On sweeney, I may delete without reading!
PGP 463A14D5 (but it's at home so it'll take a day or two)
PGP EF0607F9 (but it's at uni so don't rely on it too much)
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