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- From: mjr@hussar.dco.dec.com (Marcus J. "Buddy can you spare a clue?" Ranum)
- Newsgroups: sci.crypt
- Subject: query: how to synch crypto streams
- Message-ID: <1992Oct15.162327.28555@decuac.dec.com>
- Date: 15 Oct 92 16:23:27 GMT
- Sender: news@decuac.dec.com (USENET News System)
- Organization: Digital Equipment Corporation, Washington ULTRIX Resource Center
- Lines: 19
- Nntp-Posting-Host: hussar.dco.dec.com
-
-
- I'm just wondering. What kinds of techniques are usually used for
- synching two crypto streams? Suppose I have a pair of boxes that each can
- talk DES. There is a wire between them. I want to pass data back and
- forth encrypted. What kinds of tricks might I use to get them both talking
- together (and able to understand eachother) ;) without having to pass some
- kind of a key over the wire that an enemy could use?
-
- This seems to me to be a pretty hard problem to solve, but if I'm
- not mistaken there are boxes out there that do exactly this. Or do they
- just assume that the bag guys didn't manage to tap the first few packets
- that go back and forth? Do they somehow save state between calls?
-
- mjr.
- --
- It is important to focus on writing software that is "adequate."
- Having one's software be "good" or even "excellent" is over-rated. If
- "good" were necessary or even important, DOS would not be the de facto
- standard operating system. -notebooks of a heretic
-