From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1W2nrC-0000E3-0V for bitcoin-development@lists.sourceforge.net; Mon, 13 Jan 2014 20:11:34 +0000 Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of gnomon.org.uk designates 93.93.131.22 as permitted sender) client-ip=93.93.131.22; envelope-from=roy@gnomon.org.uk; helo=darla.gnomon.org.uk; Received: from darla.gnomon.org.uk ([93.93.131.22]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1W2nrA-0001BA-W0 for bitcoin-development@lists.sourceforge.net; Mon, 13 Jan 2014 20:11:33 +0000 Received: from darla.gnomon.org.uk (localhost.gnomon.org.uk [127.0.0.1]) by darla.gnomon.org.uk (8.14.3/8.14.3) with ESMTP id s0DKBKDW011672 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Mon, 13 Jan 2014 20:11:26 GMT (envelope-from roy@darla.gnomon.org.uk) Received: (from roy@localhost) by darla.gnomon.org.uk (8.14.3/8.14.1/Submit) id s0DKBKkA011671; Mon, 13 Jan 2014 20:11:20 GMT (envelope-from roy) Date: Mon, 13 Jan 2014 20:11:20 +0000 From: Roy Badami To: Mike Hearn Message-ID: <20140113201120.GM38964@giles.gnomon.org.uk> References: <20140106120338.GA14918@savin> <20140110102037.GB25749@savin> <20140113133746.GI38964@giles.gnomon.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Spam-Score: -1.6 (-) 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 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Headers-End: 1W2nrA-0001BA-W0 Cc: "bitcoin-development@lists.sourceforge.net" Subject: Re: [Bitcoin-development] Stealth Addresses 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: Mon, 13 Jan 2014 20:11:34 -0000 On Mon, Jan 13, 2014 at 04:58:01PM +0100, Mike Hearn wrote: > Signing a payment request for an individual is easy, anyway, depending on > the kind of ID you want. If you want to sign with an email address, just go > here with a browser like Chrome/Safari/IE that uses the system keystore: > > http://www.comodo.com/home/email-security/free-email-certificate.php > Ok, cool, I wasn't aware of such services, and I can certainly see they could be useful. But it's not that great for the business card scenario. As far as I can see, using it in that scenario would have to rely on the payer scanning the QR code on the business card, and then check that the email address displayed by their wallet matched the email address printed on the business card. roy