[82076] in Cypherpunks
Re: Recipient Anonymity
daemon@ATHENA.MIT.EDU (Matthew Ghio)
Thu Jun 19 21:53:00 1997
Date: Thu, 19 Jun 1997 18:18:51 -0700
To: cypherpunks@cyberpass.net
From: ghio@temp0099.myriad.ml.org (Matthew Ghio)
Reply-To: ghio@temp0099.myriad.ml.org (Matthew Ghio)
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.)
