Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1SgEDw-0001xo-TD for bitcoin-development@lists.sourceforge.net; Sun, 17 Jun 2012 12:04:56 +0000 X-ACL-Warn: Received: from vps7135.xlshosting.net ([178.18.90.41]) by sog-mx-1.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1SgEDw-0005ts-3P for bitcoin-development@lists.sourceforge.net; Sun, 17 Jun 2012 12:04:56 +0000 Received: by vps7135.xlshosting.net (Postfix, from userid 1000) id 36EB760C67; Sun, 17 Jun 2012 14:04:49 +0200 (CEST) Date: Sun, 17 Jun 2012 14:04:48 +0200 From: Pieter Wuille To: Mike Hearn Message-ID: <20120617120447.GA26357@vps7135.xlshosting.net> References: <20120616192651.GA13438@vps7135.xlshosting.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-PGP-Key: http://sipa.ulyssis.org/pubkey.asc User-Agent: Mutt/1.5.20 (2009-06-14) X-Spam-Score: 1.2 (+) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (pieter.wuille[at]gmail.com) 0.0 DKIM_ADSP_CUSTOM_MED No valid author signature, adsp_override is CUSTOM_MED -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 1.2 NML_ADSP_CUSTOM_MED ADSP custom_med hit, and not from a mailing list X-Headers-End: 1SgEDw-0005ts-3P Cc: bitcoin-development@lists.sourceforge.net Subject: Re: [Bitcoin-development] After compressed pubkeys: hybrid pubkeys 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: Sun, 17 Jun 2012 12:04:57 -0000 On Sun, Jun 17, 2012 at 01:01:12PM +0200, Mike Hearn wrote: > > * 0x04 [32-byte X coord] [32-byte Y coord]: uncompressed format > > * 0x06 [32-byte X coord] [32-byte Y coord]: hybrid format for even Y coords > > * 0x07 [32-byte X coord] [32-byte Y coord]: hybrid format for odd Y coords > > So what's the actual difference in format? Is there any at all, or > it's just the first number that's different? From what I understand, that is indeed the only difference. -- Pieter