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 D35B9DF3 for ; Sat, 6 Feb 2016 22:22:43 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail148109.authsmtp.co.uk (outmail148109.authsmtp.co.uk [62.13.148.109]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id B9925117 for ; Sat, 6 Feb 2016 22:22:42 +0000 (UTC) Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) by punt23.authsmtp.com (8.14.2/8.14.2/) with ESMTP id u16MMZt6018977; Sat, 6 Feb 2016 22:22:35 GMT Received: from petertodd.org (ec2-52-5-185-120.compute-1.amazonaws.com [52.5.185.120]) (authenticated bits=0) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id u16MMWV5044357 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 6 Feb 2016 22:22:33 GMT Received: from [127.0.0.1] (localhost [127.0.0.1]) by petertodd.org (Postfix) with ESMTPSA id 6FB4F40092; Sat, 6 Feb 2016 22:19:19 +0000 (UTC) Date: Sat, 6 Feb 2016 17:22:21 -0500 From: Peter Todd To: Gavin Andresen Message-ID: <20160206222221.GA12092@muck> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="TB36FDmn/VVEgNH/" Content-Disposition: inline In-Reply-To: X-Server-Quench: 1ebbe9cb-cd20-11e5-829e-00151795d556 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR bgdMdgQUHlAWAgsB AmAbWVZeUl97Wmc7 bghPaBtcak9QXgdq T0pMXVMcUQRufGFm YBseVh1xcgIIeXxw YkQsXyUJDhFzJhRg ERpWFXAHZDJldWgd WRVFdwNVdQJNdxoR b1V5GhFYa3VsNCMk FAgyOXU9MCtqYA50 ekkVN1UKRl0CGmx0 ZhYJBzgmBkBNTSE0 JB9uMV8OEQ4VM0Az LRM9XhpCUVcXBwJX FVBRDTQx X-Authentic-SMTP: 61633532353630.1037:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 52.5.185.120/25 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 Subject: Re: [bitcoin-dev] BIP proposal: Increase block size limit to 2 megabytes 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: Sat, 06 Feb 2016 22:22:44 -0000 --TB36FDmn/VVEgNH/ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Feb 06, 2016 at 10:37:30AM -0500, Gavin Andresen via bitcoin-dev wr= ote: > 2) People are committing to spinning up thousands of supports-2mb-nodes > during the grace period. Why wouldn't an attacker be able to counter-sybil-attack that effort? Who are these people? On Sat, Feb 06, 2016 at 12:45:14PM -0500, Gavin Andresen via bitcoin-dev wr= ote: > Would Blockstream be willing to help out by running a dozen or two extra > full nodes? I'll remind everyone that Bitcoin Core does not condone participation in network attacks to push controversial protcol changes through. I also checked with Adam Back, who confirmed Blockstream as a company shares those views. For those readers unfamiliar with Sybil attacks, basically what the above does is prevents nodes from being able to finding peers with accurate information about what blockchains exist - the above can be used to prevent nodes from learning about the longest chain for instance, or the existance of substantial support for a minority chain. This is why we've advocated giving users sufficient time to actively opt-in to protocol changes. --=20 https://petertodd.org 'peter'[:-1]@petertodd.org 000000000000000008320874843f282f554aa2436290642fcfa81e5a01d78698 --TB36FDmn/VVEgNH/ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQGrBAEBCACVBQJWtnIaXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDAwODMyMDg3NDg0M2YyODJmNTU0YWEyNDM2MjkwNjQyZmNm YTgxZTVhMDFkNzg2OTgvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQwIXyHOf0udz2xwf/SPxpCi+ItFDN6LDframY78Kx DJvXCSCOLrvXZNAaEa3yT5m9yMQg4/lUGINAWtVE8Qtm/KUQjozMciRgZcbioP8Z i1Q8AhSoZmVysXUuz88CGTRrto0rb+MK045HQelbS4A/2xy9bAC1WXwT/GfohNJk yM07otAAQUy7RYiFX9xFu4Lf/O61EFEUMGI89tve38cMyBkEZcunOfysTS1kXvJc PJ13Tpck3QhSu0mNHTA+d++4YRpN0g2ay/BDVo6+/rEJbpNsy433qW8j0U3zmHXy WIrF4+Fsy+cnjKJnOC+vdOLNFqI92FfnHvMfsWLiP4nh3QUSbFWFY86um1VeSA== =urXf -----END PGP SIGNATURE----- --TB36FDmn/VVEgNH/--