From owner-freebsd-hackers Fri Nov 9 7:58:16 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from silby.com (cb34181-a.mdsn1.wi.home.com [24.14.173.39]) by hub.freebsd.org (Postfix) with ESMTP id 3221737B42C for ; Fri, 9 Nov 2001 07:58:13 -0800 (PST) Received: (qmail 46138 invoked by uid 1000); 9 Nov 2001 15:58:11 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 9 Nov 2001 15:58:11 -0000 Date: Fri, 9 Nov 2001 09:58:11 -0600 (CST) From: Mike Silbersack To: Subject: CPU Temp and Fan speed as entropy? Message-ID: <20011109095347.R46119-100000@achilles.silby.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Out of curiousity, has anyone looked into using cpu temperature and fan speed as an entropy source? The thought came to last time I was in bios, looking at the temperature stats; to my untrained eye, it sure looks like those numbers bounce around a lot. I think most motherboards are coming with such sensors onboard these days, and I also believe that we have userland support for reading the values. I think we're doing just fine wrt entropy in -current, but it would still be rather neat to harvest hardware-derived entropy on a wide variety of machines. Just curious, Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message