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-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1W5CmT-0002GA-Rx for bitcoin-development@lists.sourceforge.net; Mon, 20 Jan 2014 11:12:37 +0000 Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of petertodd.org designates 62.13.149.113 as permitted sender) client-ip=62.13.149.113; envelope-from=pete@petertodd.org; helo=outmail149113.authsmtp.com; Received: from outmail149113.authsmtp.com ([62.13.149.113]) by sog-mx-4.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1W5CmS-0002nz-Md for bitcoin-development@lists.sourceforge.net; Mon, 20 Jan 2014 11:12:37 +0000 Received: from mail-c237.authsmtp.com (mail-c237.authsmtp.com [62.13.128.237]) by punt15.authsmtp.com (8.14.2/8.14.2/) with ESMTP id s0KBBtQi061680; Mon, 20 Jan 2014 11:11:55 GMT Received: from savin (76-10-178-109.dsl.teksavvy.com [76.10.178.109]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id s0KBBi8g082471 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Mon, 20 Jan 2014 11:11:47 GMT Date: Mon, 20 Jan 2014 06:11:44 -0500 From: Peter Todd To: Troy Benjegerdes Message-ID: <20140120111144.GG3468@savin> References: <20140114225321.GT38964@giles.gnomon.org.uk> <20140115230901.GA25135@netbook.cypherspace.org> <20140118174452.GG3180@nl.grid.coop> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="0qt3EE9wi45a2ZFX" Content-Disposition: inline In-Reply-To: <20140118174452.GG3180@nl.grid.coop> User-Agent: Mutt/1.5.21 (2010-09-15) X-Server-Quench: a7a90033-81c3-11e3-94fa-002590a135d3 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdAIUElQaAgsB AmIbWlVeUVx7XWs7 bAxPbAVDY01GQQRq WVdMSlVNFUsrAWdz dEcWBRl6dQFBeTBx Z05nXD4KWxVzdUZ+ QVNcFD4FeGZhPWMC WUQOJh5UcAFPdx8U a1N6AHBDAzANdhES HhM4ODE3eDlSNilR RRkIIFQOdA4WGDo9 QRkBFzEiVVYZTjky JFQvJlIGEV0KZQ18 eUA5RxcAKR4MAwZP fQkNOiILb2IdSiMv EQMSdEISCjBGWipH Q3UA X-Authentic-SMTP: 61633532353630.1024:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 76.10.178.109/587 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Score: -1.5 (-) 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 SPF_PASS SPF: sender matches SPF record X-Headers-End: 1W5CmS-0002nz-Md Cc: "bitcoin-development@lists.sourceforge.net" Subject: Re: [Bitcoin-development] unlinakble static address? & spv-privacy (Re: Stealth Addresses) 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, 20 Jan 2014 11:12:38 -0000 --0qt3EE9wi45a2ZFX Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jan 18, 2014 at 11:44:52AM -0600, Troy Benjegerdes wrote: > > Ignoring prefixes the cost for each reusable address is only a small > > percentage of the full node cost (rational: each transaction has one > > or more ECDSA signatures, and the derivation is no more expensive), so > > I would only expect computation to be an issue for large centralized > > services. (non-full nodes suffer more from just the bandwidth impact). >=20 > I have not seen anyone address my high-level question to (somewhat) compl= icated > mechanisms to keep coin flows private. >=20 > Who pays for it? From what I see it's going to double the amount of data= =20 > needed per address, further centralizing 'full' nodes. I'm fine if the NSA Actually the exact encoding is still undetermined - other encodings I proposed in my original paper are the same size or even smaller than a standard transaction. --=20 'peter'[:-1]@petertodd.org 000000000000000190a2900f1a25c507a999fa11116f7bd0126618c1ebc4f5fb --0qt3EE9wi45a2ZFX Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQGrBAEBCACVBQJS3QRwXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDE5YmI2NDlmYTdjMWQ0NGVlMDg2YWZiNjcyMWZhOTJkZGIw OTI2NTA2NjAwZDgzMjUvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQJIFAPaXwkfsbCggAnPmDxVqoreaT/r+m7ACPezq4 gX6TgzgngOcADvx3tCi9IU6Ip/6YemF8guBTgHmIyrF+r1dQIzsYYj9FHVTViyq9 oaIoOwYbOrfq6uffjro0/IGVveKe3xsDh0/p41a5WmMixqnntlqohJr6J1wKxVGF USQf8XDCtUkr7Q1zcqvZACZ1lvT56Bue/K91B0EyVVUPzjVbgdAtuhys5+phYKau BDFgKzS7IkmUdv+fTTqKY01hz6BjSCj1LdrVrM8ql9DYkCHPaZ4PCMtoYgtLjBTQ frB6cH3T9Jxg5OZCMufI7L0h3Ee963BCoJCwPdTVYpvkuWa4dJb7jOVsOaTUzA== =8nv9 -----END PGP SIGNATURE----- --0qt3EE9wi45a2ZFX--