Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191]
	helo=mx.sourceforge.net)
	by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76)
	(envelope-from <taylor.gerring@gmail.com>) id 1Vu3wj-00019p-Qq
	for bitcoin-development@lists.sourceforge.net;
	Fri, 20 Dec 2013 17:33:09 +0000
Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com
	designates 209.85.216.53 as permitted sender)
	client-ip=209.85.216.53; envelope-from=taylor.gerring@gmail.com;
	helo=mail-qa0-f53.google.com; 
Received: from mail-qa0-f53.google.com ([209.85.216.53])
	by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128)
	(Exim 4.76) id 1Vu3wi-0003ym-1G
	for bitcoin-development@lists.sourceforge.net;
	Fri, 20 Dec 2013 17:33:09 +0000
Received: by mail-qa0-f53.google.com with SMTP id j5so2863648qaq.5
	for <bitcoin-development@lists.sourceforge.net>;
	Fri, 20 Dec 2013 09:33:02 -0800 (PST)
X-Received: by 10.229.122.195 with SMTP id m3mr16159062qcr.7.1387560782556;
	Fri, 20 Dec 2013 09:33:02 -0800 (PST)
Received: from [10.174.1.6] ([50.7.31.18])
	by mx.google.com with ESMTPSA id f8sm7272580qab.19.2013.12.20.09.32.59
	for <multiple recipients>
	(version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128);
	Fri, 20 Dec 2013 09:33:00 -0800 (PST)
Content-Type: multipart/alternative;
	boundary="Apple-Mail=_4489585E-2A70-44CE-86EB-678D99E91838"
Mime-Version: 1.0 (Mac OS X Mail 7.1 \(1827\))
From: Taylor Gerring <taylor.gerring@gmail.com>
In-Reply-To: <52B359C4.3050106@sindominio.net>
Date: Fri, 20 Dec 2013 11:32:57 -0600
Message-Id: <910AE313-00A5-4DEB-8974-742FE0B14116@gmail.com>
References: <20131219131706.GA21179@savin> <52B359C4.3050106@sindominio.net>
To: System undo crew <unsystem@lists.dyne.org>
X-Mailer: Apple Mail (2.1827)
X-Spam-Score: -0.6 (/)
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
	(taylor.gerring[at]gmail.com)
	-0.0 SPF_PASS               SPF: sender matches SPF record
	0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked.
	See
	http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
	for more information. [URIs: sindominio.net]
	1.0 HTML_MESSAGE           BODY: HTML included in message
	-0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from
	author's domain
	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: 1Vu3wi-0003ym-1G
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] [unSYSTEM] DarkWallet Best Practices
X-BeenThere: bitcoin-development@lists.sourceforge.net
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: <bitcoin-development.lists.sourceforge.net>
List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>,
	<mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development>
List-Post: <mailto:bitcoin-development@lists.sourceforge.net>
List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help>
List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>,
	<mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe>
X-List-Received-Date: Fri, 20 Dec 2013 17:33:10 -0000


--Apple-Mail=_4489585E-2A70-44CE-86EB-678D99E91838
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
	charset=windows-1252

I=92m inclined to agree, as this was discussed on multiple occasions and =
seems to fix a lot of the address re-use problems. With hot topics like =
=93coin validation=94, I think it=92s important to highlight the privacy =
that generating fresh addresses from public extended keys grants us.

Also thinking about implications regarding non-merchant use of Payment =
Protocol, encouraging the exchange of extended public keys instead of a =
single address could be a boon for Payment Protocol to actually be =
useful for users. Initially, the idea was that the merchant would =
generate a new address from an extended key and include that in the =
Payment Request. How do we handle pushing the extended public key down =
to the wallet itself? Do we just shoehorn the exchange of keys into the =
Payment Protocol itself via a special tag or would this require more =
substantive change? Services could develop to facilitate the exchange =
(acting as a sort of =93PP gateway=94) or wallet software might be able =
to directly communicate, perhaps by exchanging PGP-encrypted files in =
Payment Protocol format via Bluetooth, AirDrop, email, BitMessage, or =
whatever future communications channel comes into being.=20

Thanks again to Peter for putting together a consolidated list of =
topics!

Taylor



On Dec 19, 2013, at 2:40 PM, caedes <caedes@sindominio.net> wrote:

> I feel it's missing mention of using (or not) *extended public keys*
> from bip 32 to share multiple addresses in one go, so regular payments
> can be done without asking for further addresses. Also since whoever =
has
> the extended key can generate public keys this might help P2SH where =
the
> public key is also needed.


--Apple-Mail=_4489585E-2A70-44CE-86EB-678D99E91838
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=windows-1252

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><div>I=92m inclined to agree, as this was discussed =
on multiple occasions and seems to fix a lot of the address re-use =
problems. With hot topics like =93coin validation=94, I think it=92s =
important to highlight the privacy that generating fresh addresses from =
public extended keys grants us.</div><div><br></div><div>Also thinking =
about implications regarding non-merchant use of Payment Protocol, =
encouraging the exchange of extended public keys instead of a single =
address could be a boon for Payment Protocol to actually be useful for =
users. Initially, the idea was that the merchant would generate a new =
address from an extended key and include that in the Payment Request. =
How do we handle pushing the extended public key down to the wallet =
itself? Do we just shoehorn the exchange of keys into the Payment =
Protocol itself via a special tag or would this require more substantive =
change? Services could develop to facilitate the exchange (acting as a =
sort of =93PP gateway=94) or wallet software might be able to directly =
communicate, perhaps by exchanging PGP-encrypted files in Payment =
Protocol format via Bluetooth, AirDrop, email, BitMessage, or whatever =
future communications channel comes into =
being.&nbsp;</div><div><br></div><div>Thanks again to Peter for putting =
together a consolidated list of =
topics!</div><div><br></div><div>Taylor</div><div><br></div><div><br></div=
><br><div><div>On Dec 19, 2013, at 2:40 PM, caedes &lt;<a =
href=3D"mailto:caedes@sindominio.net">caedes@sindominio.net</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;">I feel it's missing mention of using =
(or not) *extended public keys*</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><span style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;">from bip 32 to share multiple =
addresses in one go, so regular payments</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><span style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;">can be done without asking for =
further addresses. Also since whoever has</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><span style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;">the extended key can generate =
public keys this might help P2SH where the</span><br style=3D"font-family:=
 Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><span style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;">public key is also =
needed.</span></blockquote></div><br></body></html>=

--Apple-Mail=_4489585E-2A70-44CE-86EB-678D99E91838--