From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1UzRCH-00078I-IH for bitcoin-development@lists.sourceforge.net; Wed, 17 Jul 2013 12:51:09 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of petertodd.org designates 62.13.148.112 as permitted sender) client-ip=62.13.148.112; envelope-from=pete@petertodd.org; helo=outmail148112.authsmtp.co.uk; Received: from outmail148112.authsmtp.co.uk ([62.13.148.112]) by sog-mx-3.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1UzRCC-0001cP-7e for bitcoin-development@lists.sourceforge.net; Wed, 17 Jul 2013 12:51:09 +0000 Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) by punt9.authsmtp.com (8.14.2/8.14.2/Kp) with ESMTP id r6HCovOL047097; Wed, 17 Jul 2013 13:50:57 +0100 (BST) Received: from savin (76-10-178-109.dsl.teksavvy.com [76.10.178.109]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id r6HCorqZ054705 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Wed, 17 Jul 2013 13:50:55 +0100 (BST) Date: Wed, 17 Jul 2013 08:50:52 -0400 From: Peter Todd To: Tamas Blummer Message-ID: <20130717125052.GA1750@savin> References: <09D346D7-7D3D-43E9-8B43-5FCE1F188D8E@bitsofproof.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="YZ5djTAD1cGYuMQK" Content-Disposition: inline In-Reply-To: <09D346D7-7D3D-43E9-8B43-5FCE1F188D8E@bitsofproof.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Server-Quench: 858d64c9-eedf-11e2-b10b-0025903375e2 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aAdMdwUUEkAYAgsB AmUbWldeVV17XGU7 bAxPbAVDY01GQQRq WVdMSlVNFUsqB2Ry WVxfOBl3cwJGfTB2 ZEBnEHheVBB8cRV0 XxsBQTsbZGY1an1N UUAKagNUcgZDfhxG bVUqVj1vNG8XDQg5 AwQ0PjZ0MThBJSBS WgQAK04nCX0zIHY2 RgwJGjQpERpNBzo6 NE5uC1gABkEdL04z N1RDEXgZLxQVCwt9 Hl0LDjVQIlQeQDAo TGsA X-Authentic-SMTP: 61633532353630.1019:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 76.10.178.109/587 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: 1UzRCC-0001cP-7e Cc: bitcoin-development@lists.sourceforge.net Subject: Re: [Bitcoin-development] SPV bitcoind? (was: Introducing BitcoinKit.framework) 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: Wed, 17 Jul 2013 12:51:09 -0000 --YZ5djTAD1cGYuMQK Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 17, 2013 at 02:37:11PM +0200, Tamas Blummer wrote: > Would not an SPV bitcoind transfer all control on validation rules to min= er? Yes > A majority coalition of miner (pool operator) might even decide to change= block reward > rules if the rest of the network only verifies POW. Widespread dependence on SPV mode is very dangerous for Bitcoin in general due to that reason. Fraud proofs may help, but they're also another layer of never-before-tested crypto on top of an already poorly understood technology, bitcoin itself. --=20 'peter'[:-1]@petertodd.org --YZ5djTAD1cGYuMQK Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEcBAEBCAAGBQJR5pMsAAoJECSBQD2l8JH7WzYIAKXo7X4PpaJAMgxMbjTY4/jQ Hx+Zo0K7BLqASqsTLOx89u+bMHKwlM3+WBR6ON8CdtjB0J6BVQvVfYT5fm1eMBn+ ScuM3XV+T2eX35tYVMqCDD5j6dr7whsNiX6BeOWheYbwaim/f57wK428CLc31axc lqhz+jgSBhXBstIc02uEFRhM/MPtntNVv6qpwRAXVMsOz6eKOvPIa8fbT2YPuS1C qTKbSwxIbgn/DF0HDdyRzvBmBOW8Ny47bwCtq6nyurdRBZwLby3JQp9j8ZDuisq9 46O+NIUwe1Mv/Q5XWp15uREvTgLcTqqq4LXi/t96/bbNmJa8FzAiNilqJDEgyes= =CxrK -----END PGP SIGNATURE----- --YZ5djTAD1cGYuMQK--