Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752984AbcDVCwE (ORCPT ); Thu, 21 Apr 2016 22:52:04 -0400 Received: from imap.thunk.org ([74.207.234.97]:55542 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751618AbcDVCwC (ORCPT ); Thu, 21 Apr 2016 22:52:02 -0400 Date: Thu, 21 Apr 2016 22:51:55 -0400 From: "Theodore Ts'o" To: Stephan Mueller Cc: herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, sandyinchina@gmail.com Subject: Re: [RFC][PATCH 0/6] /dev/random - a new approach Message-ID: <20160422025155.GA6690@thunk.org> Mail-Followup-To: Theodore Ts'o , Stephan Mueller , herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, sandyinchina@gmail.com References: <9192755.iDgo3Omyqe@positron.chronox.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9192755.iDgo3Omyqe@positron.chronox.de> User-Agent: Mutt/1.5.24 (2015-08-30) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 454 Lines: 14 I still have a massive problem with the claims that the "Jitter" RNG provides any amount of entropy. Just because you and I might not be able to analyze it doesn't mean that somebody else couldn't. After all, DUAL-EC DRNG was very complicated and hard to analyze. So would be something like AES(NSA_KEY, COUNTER++) Very hard to analyze indeed. Shall we run statistical tests? They'll pass with flying colors. Secure? Not so much. - Ted