From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Vz9PV-00023d-2z for bitcoin-development@lists.sourceforge.net; Fri, 03 Jan 2014 18:23:53 +0000 Received: from mail-pb0-f51.google.com ([209.85.160.51]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1Vz9PT-0005Y7-Pm for bitcoin-development@lists.sourceforge.net; Fri, 03 Jan 2014 18:23:53 +0000 Received: by mail-pb0-f51.google.com with SMTP id up15so16086026pbc.10 for ; Fri, 03 Jan 2014 10:23:45 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:organization:user-agent :mime-version:to:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=h7bVbJtWKfzMDUtS8LBUks+rbzqhoPKiBzOv++WyxTw=; b=gspRiIY3V8Yvumrzot0acOScwDniUa/J3CZmDfkKoS274wau1JNaMgYX0F7XbHRP9C duGyE4vAf/DZ1aJOTKAMAiwRm3yJfyZQb8BC2D7HJ5gH5qa8BjgRniEw8Vp85RDdqgTY reh6dz9skI1T/V4RoWtR0fmzArBMJ5dIst6eWWHMRI/8GgXMGQDmASr5AIYrZcrkCJcS TAVaKsUj/0Kpit6HvghjwkGguMO3oLH6q7aEhGcO8DTfo3xmaF11BEncXtLwYqXqokqN 4jtjiEy9vAIiWDJ/nJn77EiWRzw3bhLfe2ZMZobzK5GpeVr1XjlZfUfrR7nmP0w+52E1 rvqA== X-Gm-Message-State: ALoCoQksBTI1PMAfaFWYkFdPfJBG6lTdhS/iu4x6cHAQc+B9knwTLIO5HPqBcOz/GlQ1X16upvzG X-Received: by 10.68.106.130 with SMTP id gu2mr95968629pbb.59.1388773425856; Fri, 03 Jan 2014 10:23:45 -0800 (PST) Received: from [192.168.127.226] (50-0-36-206.dsl.dynamic.sonic.net. [50.0.36.206]) by mx.google.com with ESMTPSA id sx8sm144569437pab.5.2014.01.03.10.23.42 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 03 Jan 2014 10:23:45 -0800 (PST) Message-ID: <52C7002D.7040803@monetize.io> Date: Fri, 03 Jan 2014 10:23:41 -0800 From: Mark Friedenbach Organization: Monetize.io Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: bitcoin-development@lists.sourceforge.net References: In-Reply-To: X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. X-Headers-End: 1Vz9PT-0005Y7-Pm Subject: Re: [Bitcoin-development] An idea for alternative payment scheme 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: Fri, 03 Jan 2014 18:23:53 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 There is a standard mechanism for doing that called deterministic signatures and is described in RFC 6979. It uses the private key and the HMAC construction to generate a ECDSA k value. On 01/03/2014 10:16 AM, Tier Nolan wrote: > The random number that the buyer uses could be generated from a > root key too. > > This would allow them to regenerate all random numbers that they > used and recreate their receipts. The master root would have to be > stored on your computer though. > > The payment protocol is supposed to do something like this already > though. > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJSxwAqAAoJEAdzVfsmodw4nAoQAJLyI7m2uII6Lp0bk2odiT84 rqoAZut4ESGK+lMHsVoFIkFPKAD4ZXpKEEhOa212Q4ZtQG+Ceescs04qslfzwAfO bnAQrzRzKQf68bQlvtdZ4xjsfe38GgI5LEkyxHVrwd39ZJhP2Hp4xJT5TbvrNzq7 GRDTNcM30GTAF5nW9HPT4/KXIpzYQcuylaK9IX2KRHdC5/PFMDKu3b5lGe9BqbtF hYLVyj4jAGfTr/K6UFS37sFbdPoyhkiz+S7YHy6dsqc0XMUFnx3xvkgirKkAtGBw hjDK6m+Ay+qdR6XcnOft1IXM7ctujH7Ru9RHM6K4x0Pt3x0DBLE5yahPEPg5uEAW HAHwuOGs0mDoqeYzW9Ftegh2QkmlVd0CZQmGvcVHLzuugxeR49XPIIURNTmEyk6e 9Ui6EKEbFSiQ/jeMnARIKmTAfp3uTHwEIOoNFBgFHXAe5iVtWEr/jkL1dSKrHpVm Dnt4g+IB5a8HOlvU789QeJh/wVrOH+msuhuXgb1W86zvurnnKxb5eSQx5TMy/fy1 e3IKZ9qKCodVt1I6zSCf1xJjd6QXPpxcnKco/G604GEZsg87sC3sMUsJ+g7GuHJI M05U8pNAnDjH/HHJLQj3IJhAQO4IforvgMri4sM0OeAEdDfrONjwwbWFnx638kyD r4jvFeIPyVM1574GwfJW =8qjF -----END PGP SIGNATURE-----