From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1VePa5-0004Qd-62 for Bitcoin-development@lists.sourceforge.net; Thu, 07 Nov 2013 13:25:05 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of petertodd.org designates 62.13.149.95 as permitted sender) client-ip=62.13.149.95; envelope-from=pete@petertodd.org; helo=outmail149095.authsmtp.com; Received: from outmail149095.authsmtp.com ([62.13.149.95]) by sog-mx-1.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1VePa1-0005oZ-RV for Bitcoin-development@lists.sourceforge.net; Thu, 07 Nov 2013 13:25:05 +0000 Received: from mail-c235.authsmtp.com (mail-c235.authsmtp.com [62.13.128.235]) by punt15.authsmtp.com (8.14.2/8.14.2/) with ESMTP id rA7DOnkD037885; Thu, 7 Nov 2013 13:24:49 GMT 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 rA7DOg4C092620 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Thu, 7 Nov 2013 13:24:45 GMT Date: Thu, 7 Nov 2013 08:24:42 -0500 From: Peter Todd To: Gavin Andresen Message-ID: <20131107132442.GB22476@savin> References: <5279D49D.5050807@jerviss.org> <20131107034404.GA5140@savin> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="MW5yreqqjyrRcusr" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Server-Quench: f828f24a-47af-11e3-b802-002590a15da7 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR bwdMdgUUFloCAgsB AmUbWldeUll7XWY7 bAxPbAVDY01GQQRq WVdMSlVNFUsqcBt1 eUkaIRl7dQNEeDBy Z0NjVj4NVEZyI0R5 E1NQEjxQeGZhPWMC AkhYdR5UcAFPdx8U a1UrBXRDAzANdhES HhM4ODE3eDlSNilR RRkIIFQOdA4UE3Y3 ThZKFDErVVcIQywj ZxohNTb9 X-Authentic-SMTP: 61633532353630.1023:706 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. 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[URIs: cex.io] X-Headers-End: 1VePa1-0005oZ-RV Cc: Bitcoin Dev , webmaster@ghash.io, webmaster@cex.io Subject: Re: [Bitcoin-development] we can all relax now 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: Thu, 07 Nov 2013 13:25:05 -0000 --MW5yreqqjyrRcusr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Nov 07, 2013 at 02:56:56PM +1000, Gavin Andresen wrote: > > P.S: If any large pools want to try this stuff out, give me a shout. You > > have my PGP key - confidentiality assured. > > >=20 > If I find out one of the large pools decides to run this 'experiment' on > the main network, I will make it my mission to tell people to switch to a > more responsible pool. I hope they listen. A few months ago ASICMiner could have made use of that attack if my memories of their peak hashing power were correct. They certainely could have used the selfish miner version, (we need better name for that) although development costs would eat into profits. GHash.IO, 22%, says they're a "private Bitfury ASIC mining pool" - dunno what they mean by that, but they're involved with CEX.IO who has physical control of a bunch of hashing power so I guess that means their model is like ASICMiners. They're a bit short of 30%, but maybe some behind-the-scenes deals would fix that, and/or lowering the barrier with reactive block publishing. (a better name) > And if you think you can get away with driving up EVERYBODY's orphan rate > without anybody noticing, you should think again. =2E..and remember, if you only do the attack a little bit, you still can earn more profit, and only drive up the orphan rate a little bit. So who knows, maybe the orphans are real, or maybe they're an attack? ASICMiner was involved with a bunch of orphans a while back... You know what this calls for? A witchhunt! BURN THE LARGE POOLS! > > P.P.S: If you're mining on a pool with more than, like, 1% hashing > > power, do the math on varience... Seriously, stop it and go mine on a > > smaller pool, or better yet, p2pool. > > >=20 > That I agree with. Glad to hear. --=20 'peter'[:-1]@petertodd.org 0000000000000007bd936f19e33bc8b8f9bb1f4c013b863ef60a7f5a6a5d2112 --MW5yreqqjyrRcusr Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQGrBAEBCACVBQJSe5SZXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDc3MzVkYTJhODdkMTg5N2Y5YzEyMTQwOTc5ODg0N2QyZGFk YWUwZDFlZDY2MDE2Y2EvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQJIFAPaXwkftVoQf/YR2uvRvBFy+IoPOJtaYtWHB0 0xEX/Z3JTs/fdAZ/D8gcpCKjVWSLEhIZj9hyD7XfeDrbbwE2BeF30fKJ3aPnoCUP Nq2BPBWnZAXy6tOoZxe3ZoadNPntdt/mDjwJCqnxme8Nbmy2xVhdRE/ruef9QqoK xYma/uSObC9EoExjLXgqApQ2EkbbJqiyM5inNK9bWlvTgkqZsng9f1S41Qu94ngD ENTLlmKPKMC+6vQYRMZNDcExRgC6Q5t/h0tGM91wKFoeAbnvUhZluyHPckdxIDrC 1bpQL8FqrRlIUK4KRWTR3TahqlliljSvoO5JWc5gY4aYX1aU1amL98L/byJ8tg== =hlxK -----END PGP SIGNATURE----- --MW5yreqqjyrRcusr--