From owner-freebsd-current Fri Sep 1 13:23:47 2000 Delivered-To: freebsd-current@freebsd.org Received: from smtp02.iafrica.com (smtp02.iafrica.com [196.7.0.140]) by hub.freebsd.org (Postfix) with ESMTP id 70D7A37B443; Fri, 1 Sep 2000 13:23:40 -0700 (PDT) Received: from [196.7.18.138] (helo=grimreaper.grondar.za ident=root) by smtp02.iafrica.com with esmtp (Exim 1.92 #1) id 13UxKp-0001gH-00; Fri, 1 Sep 2000 22:22:47 +0200 Received: from grimreaper.grondar.za (mark@localhost [127.0.0.1]) by grimreaper.grondar.za (8.11.0/8.11.0) with ESMTP id e81KNqx07894; Fri, 1 Sep 2000 22:23:52 +0200 (SAST) (envelope-from mark@grimreaper.grondar.za) Message-Id: <200009012023.e81KNqx07894@grimreaper.grondar.za> To: Kris Kennaway Cc: Mark Murray , Adam Back , current@FreeBSD.org, jeroen@vangelderen.org, yarrow@zeroknowledge.com Subject: Re: yarrow & /dev/random References: In-Reply-To: ; from Kris Kennaway "Fri, 01 Sep 2000 12:10:23 MST." Date: Fri, 01 Sep 2000 22:23:52 +0200 From: Mark Murray Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > I posted code and results a while back to freebsd-arch which sampled the > sound card from userland and analysed the shannon entropy of the noise > (for the record, all but one card I tried gave about 6 bits of entropy or > more per 16 bit sample with no recording device plugged in, and maximum > input gain, and could be sampled 44000 times per second or more. The other > card driver was probably broken). Thats what I'm basing this on, but I > haven't tried to make a kernel harvester. Ok! Have you still got that code? Please either send it to me (personally) or send a reference. Some ideas about how to use [this type of source] in FreeBSD are also usefulp; It's easy to "steal" a sound card; to use a sound card as an entropy source is more of a problem; ideas welcome. M -- Mark Murray Join the anti-SPAM movement: http://www.cauce.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message