Date: Mon, 7 Apr 2003 15:58:39 -0700 From: Kris Kennaway <kris@obsecurity.org> To: David Malone <dwmalone@maths.tcd.ie> Cc: freebsd-stable@freebsd.org Subject: Re: 4-stable and C rand()? Message-ID: <20030407225839.GA60254@rot13.obsecurity.org> In-Reply-To: <20030407141603.GA96746@walton.maths.tcd.ie> References: <200304070901.20557.timothy@voidnet.com> <20030407141603.GA96746@walton.maths.tcd.ie>
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--5vNYLRcllDrimb99 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Apr 07, 2003 at 03:16:03PM +0100, David Malone wrote: > Rather than use rand()%32 you might want to use something like > (rand()+RAND_MAX/64)/(RAND_MAX/32) - using the high order bits means > that you are not effectively reducing the side of the state space. Or use a better PRNG like arc4random(). Kris --5vNYLRcllDrimb99 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+kgKfWry0BWjoQKURAtn5AJ9BjR6nM0/wS5oeusQwYTyLthDbzQCg4/DL B4Vk3bprs4axtMk6nwcHcGs= =7y8h -----END PGP SIGNATURE----- --5vNYLRcllDrimb99--
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