Date: Fri, 01 Sep 2000 22:50:02 -0400 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Mark Murray <mark@grondar.za> Cc: Kris Kennaway <kris@FreeBSD.ORG>, Adam Back <adam@cypherspace.org>, current@FreeBSD.ORG, jeroen@vangelderen.org, yarrow@zeroknowledge.com Subject: Re: yarrow & /dev/random Message-ID: <200009020250.e822o2G01287@whizzo.transsys.com> In-Reply-To: Your message of "Fri, 01 Sep 2000 22:23:52 %2B0200." <200009012023.e81KNqx07894@grimreaper.grondar.za> References: <Pine.BSF.4.21.0009011206260.93877-100000@freefall.freebsd.org> <200009012023.e81KNqx07894@grimreaper.grondar.za>
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> > 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. Yes, and I'd like to run the code over some more video frames captured from the Bt848-based board. When tuned to an empty channel, there would seem to be much noise to be had.. louie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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