Cool IBM PC find

From: John Ruschmeyer <>
Date: Tue Aug 3 13:12:19 1999

> On Tue, 3 Aug 1999, Marvin wrote:
> > If it has a hard drive, it was probably not used as a Tempest machine. The
> > TPC I have contains only two floppy drives, and my understanding is that a
> > tempest machine must have media that can be removed and cannot have fixed
> > media.
> Well, perhaps someone bought this surplus and added the hard drive later.
> But both the floppy and harddrive are enclosed within their own shielded
> compartment inside the case. Still, I was surprised that there was no
> shielding on the front of the hard and floppy drives, so it does seem
> suspicious.

I think that the requirement for removable media is a function of requirements
for being physically able to secure the information as opposed to the
requirements for EM leakage.

In other words, IIRC, you could have a tempest box with non-removable media
provided that you kept it in a secure (i.e., locked) processing area such
as a vault.

Received on Tue Aug 03 1999 - 13:12:19 BST

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