Date: Sat, 24 Aug 2013 09:35:38 +0100 From: Mark R V Murray <mark@grondar.org> To: John-Mark Gurney <jmg@funkthat.com> Cc: Tim Kientzle <tim@kientzle.com>, FreeBSD-arch Arch <freebsd-arch@freebsd.org>, secteam@freebsd.org, =?iso-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no> Subject: Re: random(4) plugin infrastructure for mulitple RNG in a modular fashion Message-ID: <0ABD5A7F-D647-4958-92DB-79D277C9AE7C@grondar.org> In-Reply-To: <20130823231808.GT94127@funkthat.com> References: <20130816002625.GE76666@x96.org> <9B274F48-0C88-4117-BEAC-1A555772A3C5@grondar.org> <86a9kf733d.fsf@nine.des.no> <0C97B866-A169-4141-8368-AA7F5B5382F4@grondar.org> <861u5r71zi.fsf@nine.des.no> <892B11BD-396D-4F82-B97C-753F72CA494D@grondar.org> <86r4dr5j3p.fsf@nine.des.no> <4C1BD77C-8C6B-4044-9285-5978A3BC4B70@kientzle.com> <537622E1-F785-4BFA-B829-09DCDB484606@grondar.org> <932AB5CA-778E-438D-8FD3-8C0F29F3D117@kientzle.com> <20130823231808.GT94127@funkthat.com>
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[-- Attachment #1 --] On 24 Aug 2013, at 00:18, John-Mark Gurney <jmg@funkthat.com> wrote: > Tim Kientzle wrote this message on Sun, Aug 18, 2013 at 12:27 -0700: >> But clearly some people really want to be able to >> force /dev/random to be the unconditioned output >> of a particular HW RNG. I don't know if this is a >> good idea or not, but clearly there are people who >> want this. > > Considering that the Ivy bridge's rdrand implementation already uses > AES to condition the raw entropy source, using Yarrow/etc to > additionally condition it seems excesive, hence why some people want > to use it directly… Nehemiah as well, using a Davies-meyer hash in software. However, what may be excessive for one person may be another's requirement. M -- Mark R V Murray [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.20 (Darwin) Comment: GPGTools - http://gpgtools.org iQCVAwUBUhhwXt58vKOKE6LNAQpV2wQArVhVCiPmJijv53f34SznlHhPr3Uz4G4V htbUuHCuILD80UWjPr0/6Clr0YH29LVsVgu3hrP42fsidc7Uwnw6aHqqkV/3Dcku NssBuMEU7C9cvazBvl/u1vMue9hHdz4gaeb8wwXJeBUyJ611oI4AjZ1budJvfRQc fjTyib7efHc= =80Bz -----END PGP SIGNATURE-----
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