Date: Sun, 16 Jul 2000 20:26:44 +0200 From: Mark Murray <mark@grondar.za> To: "Andrey A. Chernov" <ache@FreeBSD.ORG> Cc: markm@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: randomdev entropy gathering is really weak Message-ID: <200007161826.UAA03911@grimreaper.grondar.za> In-Reply-To: <20000716105943.A60072@freebsd.org> ; from "Andrey A. Chernov" <ache@FreeBSD.ORG> "Sun, 16 Jul 2000 10:59:45 MST." References: <20000716105943.A60072@freebsd.org>
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> I found that I always got the same fortune quote after reboot, over and over > again. It means that /dev/random produce exact the same values after reboot. > It means that machine timer or keyboard not used for enthropy gathering. > Using keyboard alone not helps for automatic tasks because it can be even not > present, so machine timer must be used at least after reboot stage i.e. in > randomdev init procedure. Otherwise first random values are very predictable > and subject for attack. Gotcha - fix coming; I need to stash some randomness at shutdown time, and use that to reseed the RNG at reboot time. 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
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