Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752977Ab1F1ToS (ORCPT ); Tue, 28 Jun 2011 15:44:18 -0400 Received: from out4.smtp.messagingengine.com ([66.111.4.28]:52527 "EHLO out4.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752772Ab1F1ToN (ORCPT ); Tue, 28 Jun 2011 15:44:13 -0400 X-Sasl-enc: Tp+PuF+mzCMY5CxX848Xgh0fdnZg7H425KyZUcnwNXsT 1309290252 Date: Tue, 28 Jun 2011 16:44:09 -0300 From: Henrique de Moraes Holschuh To: Sandy Harris Cc: LKML Subject: Re: random(4) driver questions Message-ID: <20110628194409.GB25840@khazad-dum.debian.net> References: <20110627145442.GA2729@thunk.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-GPG-Fingerprint: 1024D/1CDB0FE3 5422 5C61 F6B7 06FB 7E04 3738 EE25 DE3F 1CDB 0FE3 User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1388 Lines: 33 On Tue, 28 Jun 2011, Sandy Harris wrote: > Johann Meier wrote: > > If you don't have a hardware rnd, you can use an entropy daemon like > > haveged (http://www.issihosts.com/haveged/) > > Yes, and there are several other alternatives. Someone suggested a The best of which is probably to _get_ a TRNG device. I can recommend this excellent and inexpensive (< ?40) one: http://www.entropykey.co.uk/ It will do ~32kbit/s (well, at least that's what mine is doing right now). It is designed for Linux and also for safe use and safe distribution of entropy. It is a small USB device, and uses the USB cdc_acm driver to talk to a FLOSS userspace application (MIT license). As any USB device, it is _not_ going to be capable of providing entropy to the kernel boot process or to very early userspace. PS: I am in no way affiliated with Simtec electronics, I am just one of their happy customers. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/