Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 13 Dec 2001 10:34:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 13 Dec 2001 10:33:58 -0500 Received: from tomcat.admin.navo.hpc.mil ([204.222.179.33]:56130 "EHLO tomcat.admin.navo.hpc.mil") by vger.kernel.org with ESMTP id ; Thu, 13 Dec 2001 10:33:52 -0500 Date: Thu, 13 Dec 2001 09:33:28 -0600 (CST) From: Jesse Pollard Message-Id: <200112131533.JAA51038@tomcat.admin.navo.hpc.mil> To: riel@conectiva.com.br, James Simmons Subject: Re: [OT] DRM OS Cc: Linux Kernel Mailing List X-Mailer: [XMailTool v3.1.2b] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Rik van Riel : > > On Wed, 12 Dec 2001, James Simmons wrote: > > > Microsoft patents loading a trusted OS into a trusted CPU. The OS prevents > > untrusted applications from accessing Rights Managed Data. > > I haven't looked up the link, but this sounds suspiciously like > what UNIX permission bits have been doing since the 1970s. > > I guess MS trying to enforce their patent against anyone would > just get it invalidated, or the claim is narrow enough that > people can work around it. > > > http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=/netahtml/search-adv.htm&r=1&f=G&l=50&d=CR99&S1=5,892,900.UREF.&OS=ref/5,892,900&RS=REF/5,892,900 > > Then again, this only applies to people unlucky enough to live > in the US. No need to worry. Besides, there are several technical flaws in the patent itself. First and formost is that it isn't new (check the Orange book on trusted computer systems and object reuse). It doesn't include the memory controled by peripherals - graphics frame buffers and device cache buffers - (the TSEC object reuse specifications do). It doesn't even include controlling access to the "trusted OS". If it did, then owners/users would no longer be able to apply any of the hundreds of patches such a system (if from M$) would require...:-) Never mind having access to a "trusted time server" by a disconnected laptop. Or defining what happens under a power failure... I wouldn't expect this to last even a first challenge, as long as the governments own documents were presented as "prior art". ------------------------------------------------------------------------- Jesse I Pollard, II Email: pollard@navo.hpc.mil Any opinions expressed are solely my own. - 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/