Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1V4IEq-0008KO-AR; Tue, 30 Jul 2013 22:17:52 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.219.43 as permitted sender) client-ip=209.85.219.43; envelope-from=mh.in.england@gmail.com; helo=mail-oa0-f43.google.com; Received: from mail-oa0-f43.google.com ([209.85.219.43]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1V4IEo-0008TH-DP; Tue, 30 Jul 2013 22:17:52 +0000 Received: by mail-oa0-f43.google.com with SMTP id i10so12445769oag.30 for ; Tue, 30 Jul 2013 15:17:45 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.182.56.232 with SMTP id d8mr4574001obq.96.1375222664991; Tue, 30 Jul 2013 15:17:44 -0700 (PDT) Sender: mh.in.england@gmail.com Received: by 10.76.23.36 with HTTP; Tue, 30 Jul 2013 15:17:44 -0700 (PDT) In-Reply-To: References: <7B0891A4-7163-43AE-85EC-8BA7ADC28A2A@grabhive.com> Date: Wed, 31 Jul 2013 00:17:44 +0200 X-Google-Sender-Auth: 0Ud0EAQEJVGGSqKWrFBix009Kbc Message-ID: From: Mike Hearn To: grarpamp Content-Type: multipart/alternative; boundary=001a11c2c91c6f19c104e2c1fa5b X-Spam-Score: -0.5 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (mh.in.england[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 1.0 HTML_MESSAGE BODY: HTML included in message 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1V4IEo-0008TH-DP Cc: Bitcoin Dev , bitcoin-list@lists.sourceforge.net Subject: Re: [Bitcoin-development] [bitcoin-list] BitMail - p2p Email 0.1. beta X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Jul 2013 22:17:52 -0000 --001a11c2c91c6f19c104e2c1fa5b Content-Type: text/plain; charset=UTF-8 TPMs have come as standard with nearly all computers (except Macs, doh) for a long time. They certainly don't cost $100. More like a few dollars at most. That's why they're so slow. On Tue, Jul 30, 2013 at 10:43 PM, grarpamp wrote: > On Tue, Jul 30, 2013 at 8:12 AM, Mike Hearn wrote: > > The TPM is a piece of secure* hardware > > I've seen some motherboards with a TPM module header but none > came with it installed. I think the modules themselves might be > $50-$100 range. They might come with some API docs. > Some of you might have links to ones you've used... > > > As part of that role, the TPM provides some permanent storage in the form > > of NVRAM. Because the TPM is designed to be as cheap as possible, it has > a > > limited number of write cycles. Normally you're meant to store Intel TXT > > launch control policies and sealed keys there > > > the goal is to avoid wearing down the drive and extend its useful life. > > Normally it doesn't matter, but if you want to delete data such that it's > > really really gone, it obviously poses a problem. Using TPM NVRAM solves > > it, albiet, at a high usability cost. > > If said TPM storage has a 'limited [but unfixed number of write cycles', > that > sounds unreliable. It would seem to me that both reliable and 'really gone' > are achievable on platters (or lesser, with ssd) provided the disk was also > encrypted. Nuke that key and it's reliably gone. > > > ------------------------------------------------------------------------------ > Get your SQL database under version control now! > Version control is standard for application code, but databases havent > caught up. So what steps can you take to put your SQL databases under > version control? Why should you start doing it? Read more to find out. > http://pubads.g.doubleclick.net/gampad/clk?id=49501711&iu=/4140/ostg.clktrk > _______________________________________________ > bitcoin-list mailing list > bitcoin-list@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-list > --001a11c2c91c6f19c104e2c1fa5b Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
TPMs have come as standard with nearly all computers (exce= pt Macs, doh) for a long time. They certainly don't cost $100. More lik= e a few dollars at most. That's why they're so slow.


On Tue, Jul 30, 2013 at 10:43 PM, grarpa= mp <grarpamp@gmail.com> wrote:
On Tue, Jul 30, 2013 at 8:12 AM, Mike Hearn <mike@plan99.net> wrote:
> The TPM is a piece of secure* hardware

I've seen some motherboards with a TPM module header but none
came with it installed. I think the modules themselves might be
$50-$100 range. They might come with some API docs.
Some of you might have links to ones you've used...

> As part of that role, the TPM provides some permanent storage in the f= orm
> of NVRAM. Because the TPM is designed to be as cheap as possible, it h= as a
> limited number of write cycles. Normally you're meant to store Int= el TXT
> launch control policies and sealed keys there

> the goal is to avoid wearing down the drive an= d extend its useful life.
> Normally it doesn't matter, but if you want to delete data such th= at it's
> really really gone, it obviously poses a problem. Using TPM NVRAM solv= es
> it, albiet, at a high usability cost.

If said TPM storage has a 'limited [but unfixed number of write c= ycles', that
sounds unreliable. It would seem to me that both reliable and 'really g= one'
are achievable on platters (or lesser, with ssd) provided the disk was also=
encrypted. Nuke that key and it's reliably gone.

---------------------------------------------------------------------------= ---
Get your SQL database under version control now!
Version control is standard for application code, but databases havent
caught up. So what steps can you take to put your SQL databases under
version control? Why should you start doing it? Read more to find out.
http://pubads.g.doubleclick.net/gam= pad/clk?id=3D49501711&iu=3D/4140/ostg.clktrk
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https://lists.sourceforge.net/lists/listinfo/bitcoin-list<= br>

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