Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site utcsri.UUCP Path: utzoo!utcsri!outer From: outer@utcsri.UUCP (Richard Outerbridge) Newsgroups: sci.math,sci.physics,sci.crypt,sci.math.stat Subject: Re: Do you use RANDOM NUMBERS? Message-ID: <4397@utcsri.UUCP> Date: Thu, 19-Mar-87 22:57:59 EST Article-I.D.: utcsri.4397 Posted: Thu Mar 19 22:57:59 1987 Date-Received: Sat, 21-Mar-87 07:45:46 EST References: <5712@reed.UUCP> Organization: CSRI, University of Toronto Lines: 12 > How do you generate them? > For DES keys I use a set of "Dungeons and Dragons" dice and a backgammon cup. Two eight-sided dice, one four-sided die, and a parity adjustment table to get the least significant bit right. Master keys and such are rarely if ever changed, and the more random they are to begin with the better. For session keys I use a function based on the clock drift between two asynchronous processors by having the slave spin a seed while idle. Then the seed gets encrypted using another time-varying number as a key. -- Richard Outerbridge (416) 961-4757 Payload Deliveries: N 43 39'36", W 79 23'42", Elev. 106.47m.