diff options
| author | Peter Todd <pete@petertodd.org> | 2015-06-08 18:28:16 -0400 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2015-06-08 22:28:34 +0000 |
| commit | a16f06277c67a07969dab27ec29f4112c3447eea (patch) | |
| tree | 50a97cb6bbc4e4c9a7e61872408e3296fa846122 | |
| parent | 14d89186a27790f03ae13b4441f58441493cd299 (diff) | |
| download | pi-bitcoindev-a16f06277c67a07969dab27ec29f4112c3447eea.tar.gz pi-bitcoindev-a16f06277c67a07969dab27ec29f4112c3447eea.zip | |
Re: [Bitcoin-development] New attack identified and potential solution described: Dropped-transaction spam attack against the block size limit
| -rw-r--r-- | d0/98ad5cd0a6dc286aaea8f44b90d86b562b3d3d | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/d0/98ad5cd0a6dc286aaea8f44b90d86b562b3d3d b/d0/98ad5cd0a6dc286aaea8f44b90d86b562b3d3d new file mode 100644 index 000000000..a9aa89251 --- /dev/null +++ b/d0/98ad5cd0a6dc286aaea8f44b90d86b562b3d3d @@ -0,0 +1,123 @@ +Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] + helo=mx.sourceforge.net) + by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) + (envelope-from <pete@petertodd.org>) id 1Z25X0-0007us-9h + for bitcoin-development@lists.sourceforge.net; + Mon, 08 Jun 2015 22:28:34 +0000 +Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of petertodd.org + designates 62.13.148.100 as permitted sender) + client-ip=62.13.148.100; envelope-from=pete@petertodd.org; + helo=outmail148100.authsmtp.co.uk; +Received: from outmail148100.authsmtp.co.uk ([62.13.148.100]) + by sog-mx-2.v43.ch3.sourceforge.com with esmtp (Exim 4.76) + id 1Z25Wy-0004VS-VK for bitcoin-development@lists.sourceforge.net; + Mon, 08 Jun 2015 22:28:34 +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 t58MSPLh073608; + Mon, 8 Jun 2015 23:28:25 +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 t58MSHsB036331 + (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); + Mon, 8 Jun 2015 23:28:23 +0100 (BST) +Date: Mon, 8 Jun 2015 18:28:16 -0400 +From: Peter Todd <pete@petertodd.org> +To: Bob McElrath <bob_bitcoin@mcelrath.org> +Message-ID: <20150608222815.GB10819@muck> +References: <5574E39C.3090904@thinlink.com> + <COL131-DS25374BEFA76744E26EB8CBCDBF0@phx.gbl> + <AD4A025F-D782-4094-9CBC-EBEF0DD04838@newcastle.ac.uk> + <COL131-DS2729F02884BC43E54C8D63CDBF0@phx.gbl> + <7E7DF414-6DDB-48A6-9199-D6883209B67D@newcastle.ac.uk> + <COL131-DS61BB9B5776DE65077ED0ACDBF0@phx.gbl> + <20150608214443.GC19826@muck> + <F0732D02-2452-46FC-BBAD-9DFDA95D2EFB@mcelrath.org> +MIME-Version: 1.0 +Content-Type: multipart/signed; micalg=pgp-sha256; + protocol="application/pgp-signature"; boundary="/NkBOFFp2J2Af1nK" +Content-Disposition: inline +In-Reply-To: <F0732D02-2452-46FC-BBAD-9DFDA95D2EFB@mcelrath.org> +X-Server-Quench: ad13a142-0e2d-11e5-b396-002590a15da7 +X-AuthReport-Spam: If SPAM / abuse - report it at: + http://www.authsmtp.com/abuse +X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR + bgdMdgoUEkAaAgsB AmMbWVdeUlV7W2c7 bApPbwxDa0lQXgBi + T01BRU1TWkFtCWFi fl1sUhp0dAZHNn9z bU9nECEPXUcrdEJ/ + X04BFzkbZGY1bX1N U0leagNUcgZDfk5E bwQuUz1vNG8XDQg5 + AwQ0PjZ0MThBJSBS WgQAK04nCWAGAXY1 WwwLFjZnHEEIQTky + IR0rJhYVGkpZKkIu PF09WFscUVcJDQlD A0BKBk5VKkIKXSsh + AA8IFWIEFyVFTCsZ HgchJARBCSBTXSwQ H1NMTlkGFz9MWyoA + QTlUUys2EBA1J09i OCAYOgJTegY/WRcF CRwXR1cw +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: 1Z25Wy-0004VS-VK +Cc: "Patrick Mccorry \(PGR\)" <patrick.mccorry@newcastle.ac.uk>, + Bitcoin Dev <bitcoin-development@lists.sourceforge.net> +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: <bitcoin-development.lists.sourceforge.net> +List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe> +List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development> +List-Post: <mailto:bitcoin-development@lists.sourceforge.net> +List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help> +List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe> +X-List-Received-Date: Mon, 08 Jun 2015 22:28:34 -0000 + + +--/NkBOFFp2J2Af1nK +Content-Type: text/plain; charset=us-ascii +Content-Disposition: inline +Content-Transfer-Encoding: quoted-printable + +On Mon, Jun 08, 2015 at 06:06:00PM -0400, Bob McElrath wrote: +> There was this wonderful technology invented a few years ago to deal with= + spam. It's called Hashcash. All these hacky heuristics like block size are= + just dancing around the problem, and the natural solution is already prese= +nt in bitcoin: smaller blocks, (down to the point of individual transaction= +s) each mined. Don't relay things that haven't been mined. As spam or trans= +action levels go up, mining targets for submission go up too. + +You know, you can think of Bitcoin as a system that maintains a ledger +for transferrable hashcash... Which means transaction fees *are* paid in +hashcash. + +--=20 +'peter'[:-1]@petertodd.org +0000000000000000127ab1d576dc851f374424f1269c4700ccaba2c42d97e778 + +--/NkBOFFp2J2Af1nK +Content-Type: application/pgp-signature; name="signature.asc" +Content-Description: Digital signature + +-----BEGIN PGP SIGNATURE----- + +iQGrBAEBCACVBQJVdhb9XhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw +MDAwMDAwMDAwMDAwMDAxMjdhYjFkNTc2ZGM4NTFmMzc0NDI0ZjEyNjljNDcwMGNj +YWJhMmM0MmQ5N2U3NzgvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 +ZUBwZXRlcnRvZC5vcmcACgkQwIXyHOf0udwOgAf+IaJoA4iPpmSeYZWnmubMgvST +Er/lERCZPuuJ6jXEj1y/Qav/tgvKjreXKBk3lBpFmHFjmt3nk9tV4TkZMWGtq2oz +qWJJRwfJRq8oc6fGRHAU8iv/jDOsptxqHEFS5AdxBMu+OjV4Fdd/3uiWBxWVZWLd +s2HHktuFbhmuyD3YdifTgxpzrtBDBvbQ1GaxwRWX+W6H2RJx1cxOOZiBeh6BVNQi +8Dq++YeUaGZ5K3ylDfh9wAjQwgtorXouCjimrYKbPEO12/rhwAyt49KsJg8FiWIb +NfQNaK5O4TUVnubJWV9Yr3DQJyfuF2/toE21Gg3gs/I7hBn4Dhx6DCj4bl5z4A== +=TXGn +-----END PGP SIGNATURE----- + +--/NkBOFFp2J2Af1nK-- + + |