From owner-freebsd-fs@FreeBSD.ORG Thu Jul 14 20:37:41 2005 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 710B216A41C; Thu, 14 Jul 2005 20:37:41 +0000 (GMT) (envelope-from kreil@ebi.ac.uk) Received: from maui.ebi.ac.uk (maui.ebi.ac.uk [193.62.196.100]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7B93C43D45; Thu, 14 Jul 2005 20:37:39 +0000 (GMT) (envelope-from kreil@ebi.ac.uk) Received: from parrot.ebi.ac.uk (parrot.ebi.ac.uk [193.62.196.69]) by maui.ebi.ac.uk (8.11.7+Sun/8.11.7) with ESMTP id j6EKbaQ05757; Thu, 14 Jul 2005 21:37:37 +0100 (BST) Received: from parrot.ebi.ac.uk (kreil@localhost) by parrot.ebi.ac.uk (8.11.6/8.11.6) with ESMTP id j6EKbaf12941; Thu, 14 Jul 2005 21:37:36 +0100 Message-Id: <200507142037.j6EKbaf12941@parrot.ebi.ac.uk> X-Mailer: exmh version 2.4 06/23/2000 with nmh-1.0.4 To: David Kreil In-Reply-To: Your message of "Sun, 05 Sep 2004 15:26:42 BST." <200409051426.i85EQgB18118@puffin.ebi.ac.uk> X-Habeas-SWE-1: winter into spring X-Habeas-SWE-2: brightly anticipated X-Habeas-SWE-3: like Habeas SWE (tm) X-Habeas-SWE-4: Copyright 2002 Habeas (tm) X-Habeas-SWE-5: Sender Warranted Email (SWE) (tm). The sender of this X-Habeas-SWE-6: email in exchange for a license for this Habeas X-Habeas-SWE-7: warrant mark warrants that this is a Habeas Compliant X-Habeas-SWE-8: Message (HCM) and not spam. Please report use of this X-Habeas-SWE-9: mark in spam to . Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Date: Thu, 14 Jul 2005 21:37:36 +0100 From: David Kreil X-EBI-Information: This email is scanned using www.mailscanner.info. X-EBI: Found to be clean X-EBI-SpamCheck: not spam, SpamAssassin (score=-8, required 5, HABEAS_SWE -8.00) Cc: freebsd-fs@freebsd.org, Poul-Henning Kamp , freebsd-questions@freebsd.org Subject: Re: gbde blackening feature - how can on disk keys be "destroyed" thoroughly? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Jul 2005 20:37:41 -0000 Dear Poul-Henning, After a job induced pause in my strong interest in encryption solutions, = I = have on my return tried to learn what has since changed with gbde. I must= be = missing the obvious because I cannot locate a "changelog" or "release not= es" = document. You have been most helpful in our discussion last year. I have now, in = particular, been wondering whether you have since at all had a chance of = revisiting the issue of blackening keys with multiple physical random = overwrite before resetting them to zero to avoid key recovery by methods = as = available from companies like www.dataclinic.co.uk. With many thanks and best regards, David. -------------------------------------------------------------------------= -- Dr David Philip Kreil = Research Fellow, Darwin College, | WWTF Vienna Science Chair of University of Cambridge | Bioinformatics, Dept of Biotechnology, ++44 1223 764107, fax 7092 810040 | c/o IAM / BOKU, A-1190 Muthgasse 18 www.inference.phy.cam.ac.uk/dpk20 | ++43 1 360066830