From: Matthias Schunter <schunter@informatik.uni-hildesheim.de>
Date: Thu, 14 Dec 1995 02:23:18 +0800
To: Adam Shostack <adam@lighthouse.homeport.org>
Subject: Re: e-Cash: CAFE vs. Mondex
Message-ID: <v02120d1bacf49fab0a7a@[147.172.54.29]>
MIME-Version: 1.0
Content-Type: text/plain


At 9:46 Uhr 13.12.1995, Adam Shostack wrote:
>Matthias Schunter wrote:
>
>| The CAFE system is a cheque based system. This means that the
>| customer receives an electronic chequebook, where each cheque is
>| (blindly) signed by the bank.  
>| During each payment the customer has to use one of these signed cheques.
>
>|  privacy-protecting
>|    The privacy of the user is protected.
>
>        How do checks protect the privacy of the user?  The bank
>knows who is spending how much with whom for each check.

No. The cheques are certified blindly. 
I.e., the bank does not see them during signing/withdrawal and therefore doe 
not re-recognize them.

However, the bank does know how much money each participant receives or 
spends, but not who's paying whom.


m

% Matthias <Schunter@acm.org> Uni Hildesheim +49(5121)883-788 fax-732