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 1Ya4M2-0001dN-3v for bitcoin-development@lists.sourceforge.net; Mon, 23 Mar 2015 15:33:26 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.212.169 as permitted sender) client-ip=209.85.212.169; envelope-from=eth3rs@gmail.com; helo=mail-wi0-f169.google.com; Received: from mail-wi0-f169.google.com ([209.85.212.169]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1Ya4M0-0001Al-7V for bitcoin-development@lists.sourceforge.net; Mon, 23 Mar 2015 15:33:26 +0000 Received: by wibg7 with SMTP id g7so50680888wib.1 for ; Mon, 23 Mar 2015 08:33:18 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.180.74.47 with SMTP id q15mr20048988wiv.90.1427124798260; Mon, 23 Mar 2015 08:33:18 -0700 (PDT) Received: by 10.180.88.73 with HTTP; Mon, 23 Mar 2015 08:33:18 -0700 (PDT) Date: Mon, 23 Mar 2015 11:33:18 -0400 Message-ID: From: Ethan Heilman To: bitcoin-development@lists.sourceforge.net Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -1.6 (-) 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 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (eth3rs[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1Ya4M0-0001Al-7V Subject: [Bitcoin-development] =?utf-8?q?Research_on_partitioning_Bitcoind?= =?utf-8?q?_nodes=3A_=22Eclipse_Attacks_on_Bitcoin=E2=80=99s_Peer-t?= =?utf-8?q?o-Peer_Network=22?= 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, 23 Mar 2015 15:33:26 -0000 Hi All, There has been much discussion lately on the dev list about misbehaving peers and attacks on the P2P network. We'd like to share our research on partitioning Bitcoind nodes from the rest of the network. Eclipse Attacks on Bitcoin=E2=80=99s Peer-to-Peer Network Abstract: We present eclipse attacks on bitcoin's peer-to-peer network. Our attack allows an adversary controlling a sufficient number of IP addresses to monopolize all connections to and from a victim bitcoin node. The attacker can then exploit the victim for attacks on bitcoin's mining and consensus system, including N-confirmation double spending, selfish mining, and adversarial forks in the blockchain. We take a detailed look at bitcoin=E2=80=99s peer-to-pee= r network, and quantify the resources involved in our attack via probabilistic analysis, Monte Carlo simulations, measurements and experiments with live bitcoin nodes. Finally, we present countermeasures, inspired by botnet architectures, that are designed to raise the bar for eclipse attacks while preserving the openness and decentralization of bitcoin=E2=80=99s current network architecture. Full paper available here: http://cs-people.bu.edu/heilman/eclipse/ Thanks, Ethan