Date: Thu, 5 Oct 2006 13:13:51 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Ricardo Nabinger Sanchez <rnsanchez@wait4.org> Cc: markm@FreeBSD.org, freebsd-arch@freebsd.org Subject: Re: PRNG on FreeBSD Message-ID: <20061005131248.R46123@fledge.watson.org> In-Reply-To: <20061004105033.b52bb860.rnsanchez@wait4.org> References: <20061004105033.b52bb860.rnsanchez@wait4.org>
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On Wed, 4 Oct 2006, Ricardo Nabinger Sanchez wrote: > Snooping around Wikipedia, I got curious about if it'd worth the effort > going from Yarrow [1] to Fortuna [2] algorithm, as the authors (seems to) > claim that the latter is better/more secure. > > As someone (me) who knows very little on how to effectively compromise a > PRNG, what are the tradeoffs? Yarrow is simpler/faster than Fortuna? Yarrow is an older PRNG algorithm, and Fortuna is (as I understand it) generally considered its successor. Mark Murray (CC'd), who implemented our current /dev/random and Yarrow code, has been working on a Fortuna implementation for FreeBSD. Robert N M Watson Computer Laboratory University of Cambridge
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