Date: Sun, 23 Jul 2000 12:30:41 +0200 From: Mark Murray <mark@grondar.za> To: Mark Murray <mark@grondar.za> Cc: Kris Kennaway <kris@FreeBSD.org>, Poul-Henning Kamp <phk@critter.freebsd.dk>, current@FreeBSD.org Subject: Re: randomdev entropy gathering is really weak Message-ID: <200007231030.MAA00534@grimreaper.grondar.za> In-Reply-To: <200007231016.MAA00486@grimreaper.grondar.za> ; from Mark Murray <mark@grondar.za> "Sun, 23 Jul 2000 12:16:08 %2B0200." References: <200007231016.MAA00486@grimreaper.grondar.za>
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> > > Obviously, if you need more randomness than a stock FreeBSD system > > > can provide you with, you add hardware to give you more randomness. > > > > This won't help if it's fed through Yarrow. > > *BZZZZTTT!* Wrong. A good hardware RNG when fed at a high-enough rate > through Yarrow can easily produce a continuous stream of what you need. > (If we take that route, the current implementation may need to be tweaked > a bit to stop reseeding after a period of unuse to avoid hammering the > kernel too much; this needs careful thought). Been thinking about this; the current implemnetation runs continuously (thanks to taskqueue(9)). There is no reason that it couldn't be made (somewhat) use-driven, so that it works harder at harvesting when being used heavily. This may make it slower, but it would hurt the kernel a bit less when not in use. 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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