[11058] in cryptography@c2.net mail archive
Absurdity? (Was: Ross's TCPA paper)
daemon@ATHENA.MIT.EDU (Hadmut Danisch)
Fri Jul 5 12:36:22 2002
From: Hadmut Danisch <hadmut@danisch.de>
Date: Fri, 5 Jul 2002 15:54:11 +0200
To: Matthew Byng-Maddick <cryptography@lists.colondot.net>
Cc: cryptography@wasabisystems.com
In-Reply-To: <20020705081427.GB76905@colon.colondot.net>
On Fri, Jul 05, 2002 at 09:14:27AM +0100, Matthew Byng-Maddick wrote:
> On Thu, Jul 04, 2002 at 10:54:11PM +0200, Hadmut Danisch wrote:
> [backdoored network cards]
> > I don't think so. As far as I understood, the
> > bus system (PCI,...) will be encrypted as well. You'll have
> > to use a NIC which is certified and can decrypt the information
> > on the bus. Obviously, you won't get a certification for such
> > an network card.
>
> Surely the obvious thing is that you build a network card without
> this property, and get it certified, and get the key to decrypt
> the data. Then you add the backdooring technology, at which point
> you have the advantage that you both have a certified "secure"
> network card, and the key to decrypt data for you on the bus.
>
> Not that I'm sure this helps, but it might.
Another question is:
How will you print? Certainly, you can't use just a plain
printer. Could be any microcontroller pretending to
be a printer. So you need a certified and tamper
resistant printing device.
But what do you print on?
Yes, you need certified paper which refuses to
agree with being copied.
Hadmut
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