Chaum's cash: backup?

(I congratulate Chaum on his ecash trial. this is a milestone.)

the recent Chaum press release and information says that cash is
"downloaded" to your local computer. 

here is my question: of course, I'm sure they have some kind of
a backup system. would someone care to comment on it? 

say I download $1000 to my hard drive and it crashes. what to do?

if it was like "real" cash, then it really would be lost.

if it wasn't like real cash, and the bank was actually tracking
it, then they could determine whether it had been "spent" so far
or prohibit someone from "cashing it in" like a hold on a check.

-----BEGIN PGP SIGNED MESSAGE-----

 An entity calling itself "Vladimir Z. Nuri" <vznuri@netcom.com> 
 allegedly wrote:
>
> here is my question: of course, I'm sure they have some kind of
> a backup system. would someone care to comment on it? 
> 
> say I download $1000 to my hard drive and it crashes. what to do?
> 
> if it was like "real" cash, then it really would be lost.
> 
> if it wasn't like real cash, and the bank was actually tracking
> it, then they could determine whether it had been "spent" so far
> or prohibit someone from "cashing it in" like a hold on a check.


Well the smart thing to do is keep multiple, well-protected copies
of your cash under your own control.  I don't really know what that
press release was referring to.  Perhaps it was saying that by
revealing your blinding factor you can reveal yourself as owner of
that coin and have that coin cancelled and re-sent to you.


To my mind, if you have kept a copy of the blinding factor, you
might as well have kept a copy of the coin...



Bryce

signatures follow


            "To strive, to seek, to find and not to yield."   
    <a href="http://ugrad-www.cs.colorado.edu/~wilcoxb/Niche.html">

                          bryce@colorado.edu                   </a>



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