From: Zdenek Kaspar Subject: Re: serpent-sse2 - different key size same speed? Date: Tue, 20 Mar 2012 09:08:22 +0100 Message-ID: <4F683AF6.30400@gmail.com> References: <20120320085319.19374u25s60oh1gk@www.81.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: linux-crypto@vger.kernel.org Return-path: Received: from plane.gmane.org ([80.91.229.3]:58735 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756225Ab2CTIKi (ORCPT ); Tue, 20 Mar 2012 04:10:38 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1S9u9I-0002tI-N7 for linux-crypto@vger.kernel.org; Tue, 20 Mar 2012 09:10:32 +0100 Received: from ip-89-176-6-41.net.upcbroadband.cz ([89.176.6.41]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 20 Mar 2012 09:10:32 +0100 Received: from zkaspar82 by ip-89-176-6-41.net.upcbroadband.cz with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 20 Mar 2012 09:10:32 +0100 In-Reply-To: <20120320085319.19374u25s60oh1gk@www.81.fi> Sender: linux-crypto-owner@vger.kernel.org List-ID: Dne 20.3.2012 7:53, Jussi Kivilinna napsal(a): > Quoting Zdenek Kaspar : > >> Hello everyone, >> >> I just quick tested 3.3.0 kernel (x86_64) to get idea how serpent-sse2 >> implementation works on Core2 machine. My dirty testing revealed that >> key size doesn't have impact on speed. Is such behavior normal ? > > It's expected result, serpent speed does not depend on key-size and for > example twofish and blowfish are another such ciphers where speed is > key-size independent. > > -Jussi Thanks for clarification and enlighten me :) (btw: nice work with serpent-sse2) Z.