From: ghio@temp0099.myriad.ml.org (Matthew Ghio)
Date: Fri, 20 Jun 1997 09:25:47 +0800
To: cypherpunks@cyberpass.net
Subject: Re: Recipient Anonymity
In-Reply-To: <199706180825.BAA20903@myriad.alias.net>
Message-ID: <199706200118.SAA13480@myriad.alias.net>
MIME-Version: 1.0
Content-Type: text/plain



3umoelle@informatik.uni-hamburg.de (Ulf =?iso-8859-1?Q?M=F6ller?=) wrote:

> How are messages selected?  It seems that the recipient needs to know
> the message IDs of all messages in the system, and must have a way to
> identify his messages.

Yes.  Message-IDs on usenet average around 30-35 bytes each, so for a
typical remailer one might have to download 1000 Message-IDs, which would
take about 32K, not much bigger than the message itself.

You could also use MD5 hashes of the messages, in which case a list of
1000 message-IDs would take only 16K.  (In the unlikely event of a hash
collision you could download those two messages seperately.  Unless the
number of messages was huge (millions), you could probably get away with
using only a 32 or 64-bit hash function.)