Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1RTB2l-0006yo-DK for bitcoin-development@lists.sourceforge.net; Wed, 23 Nov 2011 11:31:11 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.214.47 as permitted sender) client-ip=209.85.214.47; envelope-from=andyparkins@gmail.com; helo=mail-bw0-f47.google.com; Received: from mail-bw0-f47.google.com ([209.85.214.47]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1RTB2j-0008St-4C for bitcoin-development@lists.sourceforge.net; Wed, 23 Nov 2011 11:31:11 +0000 Received: by bkbzs2 with SMTP id zs2so1453939bkb.34 for ; Wed, 23 Nov 2011 03:31:02 -0800 (PST) Received: by 10.204.148.146 with SMTP id p18mr23933387bkv.36.1322047862765; Wed, 23 Nov 2011 03:31:02 -0800 (PST) Received: from dvr.localnet (mail.360visiontechnology.com. [92.42.121.178]) by mx.google.com with ESMTPS id c4sm12573493bkk.13.2011.11.23.03.31.00 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 23 Nov 2011 03:31:00 -0800 (PST) From: Andy Parkins To: Jorge =?iso-8859-1?q?Tim=F3n?= Date: Wed, 23 Nov 2011 11:30:58 +0000 User-Agent: KMail/1.13.6 (Linux/3.0.0-1-686-pae; KDE/4.6.3; i686; ; ) References: <201111231035.48690.andyparkins@gmail.com> In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2467950.y5Fj0d08VR"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201111231130.58785.andyparkins@gmail.com> 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 (andyparkins[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: 1RTB2j-0008St-4C Cc: bitcoin-development@lists.sourceforge.net Subject: Re: [Bitcoin-development] Addressing rapid changes in mining power 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: Wed, 23 Nov 2011 11:31:11 -0000 --nextPart2467950.y5Fj0d08VR Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On 2011 November 23 Wednesday, Jorge Tim=F3n wrote: > 2011/11/23, Andy Parkins : > > Let's abandon the idea of a target difficulty. Instead, every node just > >=20 > > generates the most difficulty block it can. Simultaneously, every node > > is listening for "the most difficult block generated before time T"; > > with T being > > picked to be the block generation rate (10 minutes). >=20 > A miner could try to obtain more difficulty out of time and cheat its > reported datetime (T). Just as with the current system. The defence is that on receipt of a block, its timestamp is checked against= =20 the node's own clock and averaged network clock. Blocks out of that band a= re=20 rejected. Andy =2D-=20 Dr Andy Parkins andyparkins@gmail.com --nextPart2467950.y5Fj0d08VR Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEABECAAYFAk7M2XIACgkQwQJ9gE9xL21Z5wCfQfi+azEJfplFDNmrEaPZkiV3 gKIAnAuhRkbH8ej+xvxWAgR1NxfkHKbK =Dqq0 -----END PGP SIGNATURE----- --nextPart2467950.y5Fj0d08VR--