1994-05-31 - Is DES exportability context-dependent?

Header Data

From: m5@vail.tivoli.com (Mike McNally)
To: cypherpunks@toad.com
Message Hash: 6d6b2d04d48046e6f1d7d7ef3fa9e65d0055a83d27fe2d1cad331956c2647001
Message ID: <9405311808.AA10701@vail.tivoli.com>
Reply To: N/A
UTC Datetime: 1994-05-31 18:08:51 UTC
Raw Date: Tue, 31 May 94 11:08:51 PDT

Raw message

From: m5@vail.tivoli.com (Mike McNally)
Date: Tue, 31 May 94 11:08:51 PDT
To: cypherpunks@toad.com
Subject: Is DES exportability context-dependent?
Message-ID: <9405311808.AA10701@vail.tivoli.com>
MIME-Version: 1.0
Content-Type: text/plain



I don't have my "Applied Cryptography" handy, but this keyboard's here
in front of me always ready :-)

Lets say I rigged up a "signature" system that cranked the message
through a DES or 3DES engine in CBC mode, and used the last value as
the signature (or something like that; whatever makes the most sense).
In that context---as a signature algorithm---would DES be exportable?

It's been demonstrated that something developed as a signature
algorithm but later adapted to encryption purposes remains exportable,
right?  What about going the other direction?


--
| GOOD TIME FOR MOVIE - GOING ||| Mike McNally <m5@tivoli.com>       |
| TAKE TWA TO CAIRO.          ||| Tivoli Systems, Austin, TX:        |
|     (actual fortune cookie) ||| "Like A Little Bit of Semi-Heaven" |





Thread