From: Dan Cross <cross@math.psu.edu>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] re: spam filtering fs
Date: Tue, 2 Sep 2003 20:59:26 -0400 [thread overview]
Message-ID: <200309030059.h830xQj23628@augusta.math.psu.edu> (raw)
In-Reply-To: Your message of "Tue, 02 Sep 2003 16:36:27 MDT." <Pine.LNX.4.44.0309021635330.17235-100000@maxroach.lanl.gov>
Dave writes:
> What smime (and pgp) can achieve is digital signing so that spammers
> can't masquerade with From:'s of people in your white list.
So does having an X-header that has a token in it. One easy way around
the harvesting-from-a-mailing-list-archive thing is doing something
S/Key-ish: The first time you send an email to someone, send the token
sha'ed 100,000 times. The next time, send it sha'ed 99,999 times,
etc. Both sides keep track of the token and the current sequence
number. Or, and even simpler, take the token and sha it with the
contents of the message. The token itself doesn't show up in any
archives anywhere, and the scheme is immune to problems with bounces
getting sequence numbers out of whack, and you get some modicum of
integrity checking on the message itself. A way around the client
problem is to build it into the MTA (but the MTA's on both sides have
to support it).
Ron writes:
> yeah but ... I don't even want the data coming into my machine. Is that
> covered too? I really want to get these spammers rejected instantly, which
> is why i liked the file system idea.
I think we've lost that battle. Some knocking at the castle gates
is always going to happen now days. :-(
- Dan C.
next prev parent reply other threads:[~2003-09-03 0:59 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1270037699@snellwilcox.com>
2003-09-01 15:45 ` steve.simon
2003-09-02 1:43 ` ron minnich
2003-09-02 1:53 ` boyd, rounin
2003-09-02 1:58 ` ron minnich
2003-09-02 2:04 ` Skip Tavakkolian
2003-09-02 2:15 ` boyd, rounin
2003-09-02 2:12 ` boyd, rounin
2003-09-02 2:00 ` boyd, rounin
2003-09-02 13:56 ` Eric Grosse
2003-09-02 16:08 ` Dan Cross
2003-09-02 21:28 ` boyd, rounin
2003-09-02 22:16 ` david presotto
2003-09-02 22:36 ` ron minnich
2003-09-03 0:59 ` Dan Cross [this message]
2003-09-03 1:50 ` Geoff Collyer
2003-09-03 3:35 ` Micah Stetson
2003-09-03 12:43 ` boyd, rounin
2003-09-03 12:41 ` boyd, rounin
2003-09-03 5:48 ` david presotto
2003-09-07 1:56 ` Dan Cross
2003-09-07 4:04 ` ron minnich
2003-09-07 5:34 ` Dan Cross
2003-09-07 8:51 ` boyd, rounin
2003-09-07 19:34 ` ron minnich
2003-09-07 12:35 ` David Presotto
2003-09-07 19:05 ` Dan Cross
2003-09-07 20:15 ` boyd, rounin
2003-09-08 2:22 ` Geoff Collyer
2003-09-08 5:21 ` Lucio De Re
2003-09-08 9:45 ` boyd, rounin
2003-09-03 12:37 ` boyd, rounin
2003-09-03 14:09 ` matt
2003-09-03 13:42 ` Russ Cox
2003-09-03 16:21 ` Dan Cross
2003-09-03 7:38 ` Fco.J.Ballesteros
2003-09-03 7:59 ` Lucio De Re
2003-09-03 8:24 ` Fco.J.Ballesteros
2003-09-03 12:03 ` boyd, rounin
2003-09-03 19:54 ` David Presotto
2003-09-03 21:26 ` boyd, rounin
2003-09-04 5:42 ` Lucio De Re
2003-09-04 6:15 ` George Michaelson
2003-09-04 6:10 ` Lucio De Re
2003-09-04 6:31 ` George Michaelson
2003-09-04 14:07 ` ron minnich
2003-09-03 14:27 ` ron minnich
2003-09-02 15:57 ` Dan Cross
2003-09-01 20:31 matt
2003-09-03 9:13 lucio
2003-09-03 10:09 ` Lyndon Nerenberg
2003-09-03 12:25 ` boyd, rounin
2003-09-04 4:57 ` Lucio De Re
2003-09-05 1:43 ` boyd, rounin
2003-09-05 1:52 ` David Presotto
2003-09-05 2:17 ` boyd, rounin
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