From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750853AbWEPPJP (ORCPT ); Tue, 16 May 2006 11:09:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751221AbWEPPJP (ORCPT ); Tue, 16 May 2006 11:09:15 -0400 Received: from crystal.sipsolutions.net ([195.210.38.204]:19176 "EHLO sipsolutions.net") by vger.kernel.org with ESMTP id S1750853AbWEPPJM (ORCPT ); Tue, 16 May 2006 11:09:12 -0400 Subject: Re: /dev/random on Linux From: Johannes Berg To: Michael Buesch Cc: Kyle Moffett , Alan Cox , Jonathan Day , linux-kernel@vger.kernel.org, Zvika Gutterman , Muli Ben-Yehuda In-Reply-To: <200605161658.33855.mb@bu3sch.de> References: <20060515213956.31627.qmail@web31508.mail.mud.yahoo.com> <20060516025003.GC18645@rhun.haifa.ibm.com> <200605161658.33855.mb@bu3sch.de> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-SVQzVvOE1sq3SXH4GQ+C" Date: Tue, 16 May 2006 17:08:13 +0200 Message-Id: <1147792093.983.26.camel@johannes> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --=-SVQzVvOE1sq3SXH4GQ+C Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Tue, 2006-05-16 at 16:58 +0200, Michael Buesch wrote: > I think most (all?) of the machines, OpenWRT runs on, are running > a bcm43xx wireless chip. This chip has a hardware random number > generator. patches to utilize it recently went into -mm. > But I must admit, we don't know how it generates random numbers. > But someone did some RNG tests on it in the past (I think it was > Johannes). I did, but no predictability tests, only FIPS 140-2 or so. It checked out pretty well but someone claimed that the RNG was predictable because it was probably only used for some of the coding for wireless. I don't know how to test this hypothesis as I don't know enough about QAM and whatever codings are used there (nor do I know where you'd need (pseudo-)random numbers) johannes --=-SVQzVvOE1sq3SXH4GQ+C Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iQIVAwUARGnq26Vg1VMiehFYAQK1DA/9GokEqikklB9nQ/NIEJJ1gXGJOJN4HElV U5qWYc/OXZIchg7bECxKU7h3LCgb2Uge+a0c/XFSzo9IvukBnJx8QUKe2x0vbyrZ wl4z6EXOhTlqUYyvptJ+iapan/b5Hl9L7M9JrRuLiuF/ZukMIA8nyn1IzKXiFNPR lAX3g2noJMr00ZLICbMei4UFj+agRvCTe+gGOQvnSD+6ap4ZwLDQ/zx68NNYwwi5 CU8V/Mi2rQtUeohaL7QFcxZV706gS6pq7u/qJz9vpAoSLFFM9CZc4xwEbIa8UqP1 J5Is42Sd1WSVt1VsQ60wSHckKhGsIMzIFw1VQcQR/ozELRHBgUmty3clgUg27Cfu U8CqM7rRheapgQuYelGEC8rAgtUZL/ImPHvFAfDSS42+/3D3Pkwq2XMMRqhiTuaF 991JGyD1vxiKLklUe6gpVlixFLtbil8vFpH6GNTmncWvChp40BzTbXe+cZ/jHAXG 8HWHoUTgQOBEZyQiS60/tlNTFNDZisMqK//qoa4eQMOpHR2lbsJWxldsAtrNrMci 8fE1QjjUjOmLJKS6oAiM3Xivc8ST6r3UJ9IDDc+jWSPlFKfakmMje2jhbTboFB4e qVvuVCrlBANHvvBANzUb3QMYTmxf+10nl/4HWZBVORb0o/UtL06a8WXAXxBYJ5FE iUUTRoX2GUw= =g+w8 -----END PGP SIGNATURE----- --=-SVQzVvOE1sq3SXH4GQ+C--