From: p2p-hackers@zgp.org (Artimage)
Date: Mon Jul 8 08:51:02 2002
Subject: [p2p-hackers] Distributed Timestamping Service

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I stumbled across this paper yesterday, I thought it may be useful
to those of you discussing this topic.  Maybe this is well known, but
since I hadn't seen it mentioned I thought I would throw it out
there.
 
http://citeseer.nj.nec.com/haber91how.html
Abstract: The prospect of a world in which all text, audio,  picture,
and video documents are in digital form on easily modifiable media
raises the issue of how to certify when a document was created or
last changed. The problem is to time-stamp the data, not the medium.
We propose computationally practical procedures for digital
time-stamping of such documents so that it is infeasible for a user
either to back-date or to forward-date his document, even with the
collusion of a time-stamping service....
 
This paper is also sighted by some others which may be of further
interest. I hope this is useful to someone. 
 
Artimage.-
  
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