From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id E490BBA1 for ; Wed, 15 Jul 2015 15:59:11 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail148093.authsmtp.net (outmail148093.authsmtp.net [62.13.148.93]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 8075D1F7 for ; Wed, 15 Jul 2015 15:59:10 +0000 (UTC) Received: from mail-c235.authsmtp.com (mail-c235.authsmtp.com [62.13.128.235]) by punt16.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t6FFx81X012946; Wed, 15 Jul 2015 16:59:08 +0100 (BST) Received: from savin.petertodd.org (75-119-251-161.dsl.teksavvy.com [75.119.251.161]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t6FFx45B022010 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Wed, 15 Jul 2015 16:59:07 +0100 (BST) Date: Wed, 15 Jul 2015 11:59:03 -0400 From: Peter Todd To: Me Message-ID: <20150715155903.GC20029@savin.petertodd.org> References: <24662b038abc45da7f3990e12a649b8a@airmail.cc> <55A66FA9.4010506@thinlink.com> <20150715151825.GB20029@savin.petertodd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="f+W+jCU1fRNres8c" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Server-Quench: 6c9f84df-2b0a-11e5-b397-002590a15da7 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdwcUEkAYAgsB AmMbWlJeVVR7WWQ7 bA9PbARUfEhLXhtr VklWR1pVCwQmRRp3 cFYaV2tydQdGeX4+ ZEZkXHgVWhdzI055 FhhJFz8GNHphaTUa TRJbfgRJcANIexZF O1F6ACIKLwdSbGoL FQ4vNDcwO3BTJTpg CjoMIlQTT0cAFzgg DxQFBi4iBgUPVm0/ KAEsLlNZB14cNEkz N1RpRFQTNBkcCxdb Ek0vSDNDLl8aTiE3 DARcRiYA X-Authentic-SMTP: 61633532353630.1023:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 75.119.251.161/587 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Cc: bitcoin-dev@lists.linuxfoundation.org Subject: Re: [bitcoin-dev] Significant losses by double-spending unconfirmed transactions X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Development Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Jul 2015 15:59:12 -0000 --f+W+jCU1fRNres8c Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 15, 2015 at 08:49:13AM -0700, Me wrote: > > Blockcypher's "confidence factor" model(1) > > under the hood - yet another one of those sybil attacking network > > monitoring things >=20 >=20 > Peter, I noticed on your twitter you have a lot of bad things to say abou= t Blockcypher and their business model (which I might not full agree, but t= otally respect), can you share any evidence they perform any form of Sybil = attack on the network, please.=20 For Blockcypher to succesfully do what they claim to do they need to connect to a large % of nodes on the network; that right there is a sybil attack. It's an approach that uses up connection slots for the entire network and isn't scalable; if more than a few services were doing that the Bitcoin network would become significantly less reliable, at some point collapsing entirely. --=20 'peter'[:-1]@petertodd.org 0000000000000000093f699ccdb323aa638af1131249ec2e1bacbf367163807a --f+W+jCU1fRNres8c Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQGrBAEBCACVBQJVpoNCXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDAwOTNmNjk5Y2NkYjMyM2FhNjM4YWYxMTMxMjQ5ZWMyZTFi YWNiZjM2NzE2MzgwN2EvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQJIFAPaXwkfsvRQgAiNG+bUGo3+XUQSk214d70Yfp 3IjlctdfpiW2cPh7YEYGsf2GkApaRkxkH/5sU12kpK3DYP3P3o7RW1bvF5kss5rD 98THTjsuv8DS6ZM2+H2JgzQwJzqGivzGFAxz8mnvzf/Y7G9lhsZP6Uo9U2+jcL/f iMhwCdwAL/WEbvZgBalhnz+sJIJ8J1w6Rs6JkhiRIDIA/XJvsrXYuy3p7UqJi8o3 dEOWN+WKEr/bc99h/yPDQAwIDIrtZ7jJt5lZO6ZvQ1RNM3/sPywzO3ZseyDYFHyI n8c8JWDvflFU1PeiqO4mRQRqwbHl8gniVlCPM3EgfWDAp/azoB2BjGl0mihQrw== =Ixnu -----END PGP SIGNATURE----- --f+W+jCU1fRNres8c--