From owner-freebsd-questions@FreeBSD.ORG Tue Apr 21 00:05:46 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E1A141065672 for ; Tue, 21 Apr 2009 00:05:46 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: from mail-ew0-f171.google.com (mail-ew0-f171.google.com [209.85.219.171]) by mx1.freebsd.org (Postfix) with ESMTP id 6B50E8FC0A for ; Tue, 21 Apr 2009 00:05:46 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: by ewy19 with SMTP id 19so1944966ewy.43 for ; Mon, 20 Apr 2009 17:05:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:date:from:to:subject :message-id:in-reply-to:references:x-mailer:mime-version :content-type:content-transfer-encoding; bh=3VA2MCXmSTL/9yo+C+2+eeddxlE+1ItCarz9n5nKAyM=; b=IevbEvRJYHQnWvUqwKgOPqb8/Zd7DHEfUq2ATpkWmz6i3EfJdXsi8NDnIlbCSpU9TU nKj1wyoFos5PsrJoIZUnBx7fwOY3pS6F7uk6o0N1P8TOaQZomPFCcJfx4zUJ/YJTGhRF lKZ9obVMAmTaRsSX6ChewQ1zOZ8/yKe1vC8gI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=date:from:to:subject:message-id:in-reply-to:references:x-mailer :mime-version:content-type:content-transfer-encoding; b=fsp/MjFRTpDsi+wJLDE/im8Z6kvBIHwIU4V+rx/8cy9BrBmdvnbQcyPwQW5MsDhO97 R5WxKdHj9AY8Z9Z1Jmczkj7OiBFm6rYcI2/uzmxYDe1/BV9rGHBgdeshygYweSU/43bd mhapTDJeI47szdjxHGffoDa6hzATOcPTJbhqY= Received: by 10.210.35.5 with SMTP id i5mr4321111ebi.31.1240272345369; Mon, 20 Apr 2009 17:05:45 -0700 (PDT) Received: from gumby.homeunix.com (bb-87-81-140-128.ukonline.co.uk [87.81.140.128]) by mx.google.com with ESMTPS id 5sm1826782eyh.55.2009.04.20.17.05.43 (version=SSLv3 cipher=RC4-MD5); Mon, 20 Apr 2009 17:05:44 -0700 (PDT) Date: Tue, 21 Apr 2009 01:05:40 +0100 From: RW To: freebsd-questions@freebsd.org Message-ID: <20090421010540.1407c3a0@gumby.homeunix.com> In-Reply-To: <64c038660904201317k465064c3mece86b4ad9ed1e73@mail.gmail.com> References: <49ECCF4E.3060104@bah.homeip.net> <64c038660904201317k465064c3mece86b4ad9ed1e73@mail.gmail.com> X-Mailer: Claws Mail 3.7.1 (GTK+ 2.16.1; i386-portbld-freebsd7.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: Encrypted slice with geli X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Apr 2009 00:05:47 -0000 On Mon, 20 Apr 2009 14:17:40 -0600 Modulok wrote: > Cryptographically speaking: No, the majority of your data still > exists as magnetic signatures on the physical disk. (Though is not > directly accessible.) This is a bit misleading, the data in the unwritten disk sectors is still accessible through the device, so it would still be possible to image the disk and perform offline reconstruction of the data. You wouldn't need to rely on magnetic hysteresis.