From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <069401c14804$21ca9c40$a2b9c6d4@SOMA>
From: "Boyd Roberts" <boyd@fr.inter.net>
To: <9fans@cse.psu.edu>
References: <20010928010622.17297199E7@mail.cse.psu.edu>
Subject: Re: [9fans] on the topic of viruses
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Date: Fri, 28 Sep 2001 11:58:32 +0200
Topicbox-Message-UUID: f5f4e44a-eac9-11e9-9e20-41e7f4b1d025

> http://www.cs.bell-labs.com/who/dmr/tdvirus.pdf

i love the scan.  i know that i'd read it, i just can't think how.

paul vixie changed gatekeeper's kernel in '92/93 so that only root
could set the public execute bit as a form of certification, which
duff speaks of.  of course, this was just glue but nevertheless a
clever, easy to implement and efficient hack.