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-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Z25VC-0003cd-Q4 for bitcoin-development@lists.sourceforge.net; Mon, 08 Jun 2015 22:26:42 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of petertodd.org designates 62.13.148.93 as permitted sender) client-ip=62.13.148.93; envelope-from=pete@petertodd.org; helo=outmail148093.authsmtp.net; Received: from outmail148093.authsmtp.net ([62.13.148.93]) by sog-mx-3.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1Z25VA-0008KF-Tx for bitcoin-development@lists.sourceforge.net; Mon, 08 Jun 2015 22:26:42 +0000 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 t58MQWwR035206; Mon, 8 Jun 2015 23:26:32 +0100 (BST) Received: from muck (bas3-cooksville17-1176329630.dsl.bell.ca [70.29.93.158]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t58MQNDo030763 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Mon, 8 Jun 2015 23:26:28 +0100 (BST) Date: Mon, 8 Jun 2015 18:26:22 -0400 From: Peter Todd To: "Patrick Mccorry (PGR)" Message-ID: <20150608222622.GA10819@muck> References: <5574E39C.3090904@thinlink.com> <20150608213336.GA19826@muck> <4A74E0B9-869E-448A-BFC7-7FD2F50F142F@newcastle.ac.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="qMm9M+Fa2AknHoGS" Content-Disposition: inline In-Reply-To: <4A74E0B9-869E-448A-BFC7-7FD2F50F142F@newcastle.ac.uk> X-Server-Quench: 69841337-0e2d-11e5-b396-002590a15da7 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdgoUEkAaAgsB AmMbWVdeUlt7WmI7 bApPbwxDa0lQXgBi T01BRU1TWkFtCWFg eGpBUhpycANFNnd4 YEAsWHlTWEV5dkFg QhtWQXAHZDJldTIc WUZFdwNWdQpKLx5A PgF4GhFYa3VsFCMk FAgyOXU9MCtSLCNN RwwLMWdaZ0sUVjcg WxkJHn0uEUADWyQ9 LhEqYlcaEA4JNVk/ N0cgUFZ6ewQVDhBC HkZLYSNUPFIbRiAm AVEScVQZCCVQTWJA GBQuORZDHj1VXGJD HEJAAxgTFypOU2FB Rz9cVDYxREQpKgog NiMUMmNQABwsRlJJ DBgTWiPB X-Authentic-SMTP: 61633532353630.1023:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 70.29.93.158/587 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: 1Z25VA-0008KF-Tx Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] New attack identified and potential solution described: Dropped-transaction spam attack against the block size limit 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: Mon, 08 Jun 2015 22:26:42 -0000 --qMm9M+Fa2AknHoGS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jun 08, 2015 at 10:13:10PM +0000, Patrick Mccorry (PGR) wrote: > With the 0.01mBTC/KB minimum > relay fee and $230 USD/BTC that works out to about $2.3kUSD/GB of ram >=20 > IIRC, the fee is 0.1mBTC, so it's $23/MB (assuming 1,000 tx * 2.3 cents) = and $23k/GB (assuming $23 * 1000, as each $23 is 1mb). Only pointing out as= it highlights thats it's even more expense to do. Mike Hearn reduced the minimum relay fee to 0.01mBTC/KB: https://github.com/bitcoin/bitcoin/pull/3305 --=20 'peter'[:-1]@petertodd.org 0000000000000000127ab1d576dc851f374424f1269c4700ccaba2c42d97e778 --qMm9M+Fa2AknHoGS Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQGrBAEBCACVBQJVdhaLXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDAxMjdhYjFkNTc2ZGM4NTFmMzc0NDI0ZjEyNjljNDcwMGNj YWJhMmM0MmQ5N2U3NzgvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQwIXyHOf0udyQUgf9GgtlhnH32aGw2gnoAbXS13ow +MPtMy1D4lIbw8RBtqk0OneEza7JhQ+APf2w3R7Da0zvXNxbVNvRQlvMqb1Y3Zly D5QaujMSuKiruZ9Yo9PK5wyl4r82imI4Oq78bo21V0cvvOjEr8QPIwh9dXcy7LJ7 XDymnR9O0IFXY4P3HLRoUsbjKXzBJm4VKUCR5QCPco0XqDjQkvH9yhW42apbD+u8 stllpBmW1rxYdG3JCxazNOg1fT3yItxD+xUa46X9arbqJNyEjuF2R9cgbFsB0vYW JebgLgGB8y8gylcE2kz0OUjMUToFz44+9J20N1Pw1gNw9AMGEknWozYNx5Y94Q== =UGVs -----END PGP SIGNATURE----- --qMm9M+Fa2AknHoGS--