From: Eric Murray <ericm@lne.com>
Date: Tue, 8 Sep 1998 08:55:35 +0800
To: mgering@ecosystems.net
Subject: Re: cryptographically secure mailing list software
In-Reply-To: <33CCFE438B9DD01192E800A024C84A19284612@mossbay.chaffeyhomes.com>
Message-ID: <199809080053.RAA07220@slack.lne.com>
MIME-Version: 1.0
Content-Type: text/plain



Matthew James Gering writes:
> 
> 
> I've been curious as to whether anyone has developed and/or whether it
> is technically feasible to develop a cryptographically secure
> listserver.
> 
> e.g. 
> 
> User would submit their PGP public key to the listserver upon
> subscription, submitted messages would be encrypted with the
> listserver's public key, the listserver would decrypt the message and
> re-encrypt it with the key of all members and distribute it. This way
> the users don't need to manage all the keys or even know the list
> membership. Most listservers already have the ability to moderate
> subscription messages, the list would not be snoopable.
> 
> What sort of overhead would exist on a list of a few hundred members?

At ~1sec/ encryption (varies greatly depending on your list hardware, should
be less on a newer PC) adding an extra 200 seconds of CPU time for each 
mail message to the list is probably acceptable.


> If there is not something existing that will do this

Check out PGPdomo.

I found a copy at:
ftp://hawww.ha.osd.mil/pgpdomo/pgpdomo.tar.Z


-- 
Eric Murray          N*Able Technologies                    www.nabletech.com
(email:  ericm  at the sites lne.com or nabletech.com)     PGP keyid:E03F65E5