Great Circle Associates Firewalls
(April 1994)
 

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Subject: Re: What??
From: Marcus J Ranum <mjr @ tis . com>
Date: Thu, 7 Apr 94 22:36:57 EDT
To: CHIP @ bdso . cv . com, firewalls @ GreatCircle . COM

>Would someone fill me in on the Digital Pathways DES keys thing?
>I'm in the dark. What are they, and why are they so popular?

	It's a handheld cryptographic authentication calculator.
They cost ~$55 in quantity. They contain a replaceable (hot swap)
battery that keeps a DES key in memory all the time. The admin
programs the key into it -- so you don't rely on someone else
to key your authentication device.
	It's fairly solid, not especially attractive, but it uses
an algorithm someone published a few years back, that's easy to
implement in software, so you can avoid host-software licensing,
portability, and availability issues.
	It's one of the authentication devices the TIS firewall
toolkit supports -- we have a server-side implementation that
requires no additional software, so you can just buy 'em and key
'em and issue 'em to users.

mjr.

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