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Re: How can e-cash, even on-line cleared, protect payee identity?



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Hello Hal <[email protected]>
  and [email protected]

H wrote:
> Jiri Baum <[email protected]> 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 <[email protected]>.
On sweeney, I may delete without reading!
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