From mboxrd@z Thu Jan  1 00:00:00 1970
To: 9fans@cse.psu.edu
From: "Douglas A. Gwyn" <DAGwyn@null.net>
Message-ID: <3BB3E0F3.8493DD06@null.net>
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References: <20010928010622.17297199E7@mail.cse.psu.edu>
Subject: Re: [9fans] on the topic of viruses
Date: Mon,  1 Oct 2001 09:55:29 +0000
Topicbox-Message-UUID: f7a17240-eac9-11e9-9e20-41e7f4b1d025

dmr@plan9.bell-labs.com wrote:
> ... AT&T Federal Systems
> did do System V/MLS certified to B1 or B2 or so.

What I found especially fascinating was that the security
policy was enforced even within the 5620 terminal's
windowing system, so that the user could not cut and
paste data between levels in the "wrong" direction.