Newsgroups: sci.crypt Path: cactus.org!milano!cs.utexas.edu!sdd.hp.com!mips!mips!munnari.oz.au! + uunet!mcsun!Germany.EU.net!rzsun2.informatik.uni-hamburg.de!fbihh! + bontchev From: bontchev@fbihh.informatik.uni-hamburg.de (Vesselin Bontchev) Subject: Testing random number generators Message-ID:Sender: news@informatik.uni-hamburg.de (Mr. News) Reply-To: bontchev@fbihh.informatik.uni-hamburg.de Organization: Virus Test Center, University of Hamburg Date: 23 Jun 92 09:17:18 GMT Lines: 16 When testing the random distribution of the numbers generated by a random number generator, it is sometimes useful to do a two-dimensional test. That is, use the consecutively generated random numbers as pairs of X,Y coordinates and plot a point at these coordinates. If the generator is truly random, the points must be distributed uniformly. I have seen at least one RNG which generates are granular picture - that is the points tend to group into clusters... Regards, Vesselin -- Vesselin Vladimirov Bontchev Virus Test Center, University of Hamburg Tel.:+49-40-54715-224, Fax: +49-40-54715-226 Fachbereich Informatik - AGN ** PGP public key available by finger. ** Vogt-Koelln-Strasse 30, rm. 107 C e-mail: bontchev@fbihh.informatik.uni-hamburg.de D-2000 Hamburg 54, Germany