Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1SZOSM-0003bA-6I for bitcoin-development@lists.sourceforge.net; Tue, 29 May 2012 15:35:34 +0000 X-ACL-Warn: Received: from zinan.dashjr.org ([173.242.112.54]) by sog-mx-2.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1SZOS9-0007oZ-8Q for bitcoin-development@lists.sourceforge.net; Tue, 29 May 2012 15:35:34 +0000 Received: from ishibashi.localnet (unknown [97.96.85.141]) (Authenticated sender: luke-jr) by zinan.dashjr.org (Postfix) with ESMTPSA id 9C7C55605A1; Tue, 29 May 2012 15:35:11 +0000 (UTC) From: "Luke-Jr" To: Peter Vessenes Date: Tue, 29 May 2012 15:34:37 +0000 User-Agent: KMail/1.13.7 (Linux/3.2.12-gentoonestfix-intelwr; KDE/4.8.1; x86_64; ; ) References: <201205291518.56618.luke@dashjr.org> In-Reply-To: X-PGP-Key-Fingerprint: E463 A93F 5F31 17EE DE6C 7316 BD02 9424 21F4 889F X-PGP-Key-ID: BD02942421F4889F X-PGP-Keyserver: hkp://pgp.mit.edu MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201205291534.40364.luke@dashjr.org> X-Spam-Score: -0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 AWL AWL: From: address is in the auto white-list X-Headers-End: 1SZOS9-0007oZ-8Q Cc: bitcoin-development@lists.sourceforge.net, Michael Subject: Re: [Bitcoin-development] Punishing empty blocks? 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: Tue, 29 May 2012 15:35:34 -0000 On Tuesday, May 29, 2012 3:28:56 PM Peter Vessenes wrote: > I don't understand what the 20 byte keyhash is. Can you elucidate? 20 byte keyhashes are a fundamental building block of the Bitcoin protocol. ripemd160(sha256(ecdsaPubKey))