Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1V4GI5-0003ac-8D for bitcoin-development@lists.sourceforge.net; Tue, 30 Jul 2013 20:13:05 +0000 Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of petertodd.org designates 62.13.148.108 as permitted sender) client-ip=62.13.148.108; envelope-from=pete@petertodd.org; helo=outmail148108.authsmtp.net; Received: from outmail148108.authsmtp.net ([62.13.148.108]) by sog-mx-4.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1V4GI3-0003Tp-2l for bitcoin-development@lists.sourceforge.net; Tue, 30 Jul 2013 20:13:05 +0000 Received: from mail-c235.authsmtp.com (mail-c235.authsmtp.com [62.13.128.235]) by punt5.authsmtp.com (8.14.2/8.14.2/Kp) with ESMTP id r6UKCunn072930; Tue, 30 Jul 2013 21:12:56 +0100 (BST) Received: from petertodd.org (petertodd.org [174.129.28.249]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id r6UKCojN080845 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Tue, 30 Jul 2013 21:12:53 +0100 (BST) Date: Tue, 30 Jul 2013 16:12:50 -0400 From: Peter Todd To: Wendell Message-ID: <20130730201250.GB3555@petertodd.org> References: <20130730183043.GA32398@petertodd.org> <20130730201141.GA3555@petertodd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="neYutvxvOLaeuPCA" Content-Disposition: inline In-Reply-To: <20130730201141.GA3555@petertodd.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-Server-Quench: 6a928011-f954-11e2-b5c5-002590a15da7 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdQIUEkAYAgsB AmUbWVVeUV97XGA7 ag1VcwRfa1RMVxto VEFWR1pVCwQmQxpk fW1BCGdyfwVOfHs+ Y0FkWj5dDU14fUZ8 Q1MCHGgCeGZhPWIC AkULch5UcAFPdx8U a1UrBXRDAzANdhES HhM4ODE3eDlSNilR RRkIIFQOdA43GSR0 ThYOVR8uAUYCRiNb X-Authentic-SMTP: 61633532353630.1023:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 174.129.28.249/587 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Score: -1.5 (-) 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 SPF_PASS SPF: sender matches SPF record X-Headers-End: 1V4GI3-0003Tp-2l Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] Tor and Bitcoin 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 20:13:05 -0000 --neYutvxvOLaeuPCA Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jul 30, 2013 at 04:11:41PM -0400, Peter Todd wrote: > Unrelated to Tor, but an interesting possibility to improve SPV security > is to ask for the history of a given txout - that is the previous > transactions that funded it. You could even do this with a > zero-knowledge proof, sampling some subset of the prior transactions to s/zero-knowledge/non-interactive/ --=20 'peter'[:-1]@petertodd.org 000000000000007f87c6d7e6b8c2dbf36c72c3db4a05055b604faeec59bda024 --neYutvxvOLaeuPCA Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAlH4HkIACgkQpEFN739thoz71wCfUyzjTwwpjJZCrkowJtltvtMd /G8An0RJDQkimI55w0G6hA51vW1nEfL+ =rTO4 -----END PGP SIGNATURE----- --neYutvxvOLaeuPCA--