1994-07-26 - Re: CYPHERPUNKS TO THE RESCUE

Header Data

From: nelson@crynwr.com (Russell Nelson)
To: cypherpunks@toad.com
Message Hash: 656754192d95bbd76ec0f140c375dcce1480d3ba93bb65c7605c04863e3502ae
Message ID: <m0qSmuj-000I8XC@crynwr.com>
Reply To: <199407260711.AAA10426@netcom.netcom.com>
UTC Datetime: 1994-07-26 13:49:00 UTC
Raw Date: Tue, 26 Jul 94 06:49:00 PDT

Raw message

From: nelson@crynwr.com (Russell Nelson)
Date: Tue, 26 Jul 94 06:49:00 PDT
To: cypherpunks@toad.com
Subject: Re: CYPHERPUNKS TO THE RESCUE
In-Reply-To: <199407260711.AAA10426@netcom.netcom.com>
Message-ID: <m0qSmuj-000I8XC@crynwr.com>
MIME-Version: 1.0
Content-Type: text/plain


   Date: Tue, 26 Jul 1994 00:11:34 -0700
   From: norm@netcom.com (Norman Hardy)

   At 14:43 1994/07/25 -0700, Sandy Sandfort wrote:
   >The questions are:  Could standard auto and garage door openers
   >easily be retrofitted?  Could a "crypto remote" with its own CPU
   >be made small enough to fit into a hand-held unit?  Could such a
   >system be made for a reasonable cost?

   Sounds like an application for a "challenge-response" system. But that
   would require transmission from garage unit to car unit.

   If there were syncnronized clocks then the signal could be a function of
   time so that the above replay would fail. That requires only a PRNG.

Why not generate a random number, checksum it, and sign it using a
public key?  Or is that overkill?

-russ <nelson@crynwr.com>    http://www.crynwr.com/crynwr/nelson.html
Crynwr Software   | Crynwr Software sells packet driver support | ask4 PGP key
11 Grant St.      | +1 315 268 1925 (9201 FAX)  | What is thee doing about it?
Potsdam, NY 13676 | LPF member - ask me about the harm software patents do.





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