From owner-freebsd-questions@FreeBSD.ORG Thu Feb 7 19:51:31 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id D48096C9 for ; Thu, 7 Feb 2013 19:51:31 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: from mail-wi0-f172.google.com (mail-wi0-f172.google.com [209.85.212.172]) by mx1.freebsd.org (Postfix) with ESMTP id 5B87B9C9 for ; Thu, 7 Feb 2013 19:51:31 +0000 (UTC) Received: by mail-wi0-f172.google.com with SMTP id ez12so7871wid.11 for ; Thu, 07 Feb 2013 11:51:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=x-received:date:from:to:subject:message-id:in-reply-to:references :x-mailer:mime-version:content-type:content-transfer-encoding; bh=s9jX1C8Pi6DRMCbvGOmQBY8Fh1qX8rv9i3E2rhrpro8=; b=OYPS74UUdLbZs3zwvqaJ34w2n0aMYRGUPCGZ8i3radUhOSMcZW6Pw4n9G4+6444UQv JkmFPAgsNaQODcf2/Ydj51/PO+2/mTYMMMR1bKeQVpHbzqep9yqCxFAKLwNM0AyaUNFI Nm6JYDllHatF1TcyZ+i/WM2iuUbBw++hDVg2YTVmgXdCciPQISgoxEPmND0Cu9XGum4U kulUOtVYVgJdWUmIUpmAFK8l/OvMbUVgAto5fAqJtBJlikogR9UvEeviRK0PBuVVNSrR kNqWIsjv1onxA75GH+Ot3iyyfMYH0Y/5UoGrNzbAc/vDhbw4uHHdtZZoLEpgyvER6FVg JOfg== X-Received: by 10.194.171.198 with SMTP id aw6mr5336074wjc.3.1360266690333; Thu, 07 Feb 2013 11:51:30 -0800 (PST) Received: from gumby.homeunix.com (87-194-105-247.bethere.co.uk. [87.194.105.247]) by mx.google.com with ESMTPS id w5sm10652737wif.11.2013.02.07.11.51.28 (version=SSLv3 cipher=RC4-SHA bits=128/128); Thu, 07 Feb 2013 11:51:29 -0800 (PST) Date: Thu, 7 Feb 2013 19:51:27 +0000 From: RW To: freebsd-questions@freebsd.org Subject: Re: geli overhead? Message-ID: <20130207195127.43dd1ae3@gumby.homeunix.com> In-Reply-To: References: X-Mailer: Claws Mail 3.9.0 (GTK+ 2.24.6; amd64-portbld-freebsd8.3) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Feb 2013 19:51:31 -0000 On Mon, 4 Feb 2013 22:25:33 +0100 mhca12 wrote: > Does skipping authentication also remove the requirement of > zeroing the whole eli disk for the checksums? It's not needed from that perspective, but it makes it a bit more secure if you do that or fill the device from /dev/random before the init. If you don't do either an attacker may be able infer information about the layout of files.