At 08:18 PM 9/14/95 +0200, you wrote:

There is a paper about explaining Zero Knowledge methods in simple words. It's titled "Explainig Zero Knowledge Authentication to your children" or something similar.

I think you are refering to Quisquater's (sp?) explanation, which is in terms of Ali Baba and a magic cave. A functionally similar explanation is in Schneier's Applied Crypto, pp. 85-86. -- Karl L. Barrus <klbarrus@infocom.net>