digital cash and identity disclosure

[Olmur]

>>>>> "Holger" Reif <Holger.Reif at PrakInf.TU-Ilmenau.DE> writes:

Holger> I don't understand how this could happen? The two coins are
Holger> identical (as I understood it from the tech backgound of
Holger> ecash). what has a double- spended coin what a copied
Holger> single-spended coin not has?

In Chaum's system spending a coin is a cut-and-choose protocol: with
overwhelming probability you reveal informations about your ID, when
you present your e-coin a second time.


Bye!

Michael Deindl