From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.saout.de ([127.0.0.1]) by localhost (mail.saout.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mW6bY9b2cAyq for ; Sun, 14 Aug 2011 01:35:26 +0200 (CEST) Received: from mailout-de.gmx.net (mailout-de.gmx.net [213.165.64.22]) by mail.saout.de (Postfix) with SMTP for ; Sun, 14 Aug 2011 01:35:26 +0200 (CEST) Content-Type: text/plain; charset="utf-8" Date: Sun, 14 Aug 2011 01:35:23 +0200 From: wolfgang.aigner@gmx.de In-Reply-To: Message-ID: <20110813233523.241220@gmx.net> MIME-Version: 1.0 References: Content-Transfer-Encoding: 8bit Subject: Re: [dm-crypt] "re-encrypting" ? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Steve Verniers , dm-crypt@saout.de Hello Steve, > I have encrypted my FS with cryptsetup and see it's > 256bit but I found that it is too taxing on my systems resources (only > Pentium 4 machine with 2GB ram) Could I "re-encrypt" the FS without > loosing > the data which is already stored on it ? I have no room to backup so much > space. Yes, but its always dangerous and you could loose all your data. Don't trust on that and do a backup. If it doesn't matter if you loose anything you could use: dd if=/dev/mapper/[cryptdevice] of=/dev/[device] conv=notrunc Be aware this is DANGEROUS. > Also what would be a recommanded bit for a system such as mine ? 64bit ? > 128 You get a bit more Speed with 128 Bit AES, but still it is slower than withou encryption. cheers Wolfgang -- NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie! Jetzt informieren: http://www.gmx.net/de/go/freephone