From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WTpVg-0005g4-49 for bitcoin-development@lists.sourceforge.net; Sat, 29 Mar 2014 09:25:04 +0000 X-ACL-Warn: Received: from chello084114181075.1.15.vie.surfer.at ([84.114.181.75] helo=mini.local) by sog-mx-2.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1WTpVe-00006w-Rt for bitcoin-development@lists.sourceforge.net; Sat, 29 Mar 2014 09:25:04 +0000 Received: from localhost (localhost [127.0.0.1]) by mini.local (Postfix) with ESMTP id CB6C55165DE for ; Sat, 29 Mar 2014 10:08:58 +0100 (CET) X-Virus-Scanned: amavisd-new at mini.local Received: from mini.local ([127.0.0.1]) by localhost (mini.local [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yJ8e5wjOMt3t for ; Sat, 29 Mar 2014 10:08:49 +0100 (CET) Received: from [192.168.0.14] (chello084114181075.1.15.vie.surfer.at [84.114.181.75]) by mini.local (Postfix) with ESMTPSA id 2211D5165C9 for ; Sat, 29 Mar 2014 10:08:49 +0100 (CET) Content-Type: multipart/signed; boundary="Apple-Mail=_0D199B2A-11D7-4450-8D8D-34393DBAE4AC"; protocol="application/pgp-signature"; micalg=pgp-sha1 Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\)) X-Pgp-Agent: GPGMail 2.1 (8c620b1) From: Chris Beams In-Reply-To: <1878927.J1e3zZmtIP@crushinator> Date: Sat, 29 Mar 2014 10:08:47 +0100 Message-Id: <83BBF97F-290E-4CF9-B062-92445ED35F27@beams.io> References: <1878927.J1e3zZmtIP@crushinator> To: bitcoin-development@lists.sourceforge.net X-Mailer: Apple Mail (2.1874) X-Spam-Score: 1.3 (+) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 1.3 RCVD_IN_RP_RNBL RBL: Relay in RNBL, https://senderscore.org/blacklistlookup/ [84.114.181.75 listed in bl.score.senderscore.com] 0.0 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [84.114.181.75 listed in dnsbl.sorbs.net] X-Headers-End: 1WTpVe-00006w-Rt Subject: Re: [Bitcoin-development] Presenting a BIP for Shamir's Secret Sharing of Bitcoin private keys 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: Sat, 29 Mar 2014 09:25:04 -0000 --Apple-Mail=_0D199B2A-11D7-4450-8D8D-34393DBAE4AC Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Matt, could you expand on use cases for which you see Shamir's Secret = Sharing Scheme as the best tool for the job? In particular, when do you = see that it would be superior to simply going with multisig in the first = place? Perhaps you see these as complimentary approaches, toward = defense-in-depth? In any case, the Motivation and Rationale sections of = the BIP in its current form are silent on these questions. On Mar 29, 2014, at 9:05 AM, Matt Whitlock = wrote: > Abstract: A method is described for dividing a Bitcoin private key = into shares in a manner such that the key can be reconstituted from any = sufficiently large subset of the shares but such that individually the = shares do not reveal any information about the key. This method is = commonly known as Shamir's Secret Sharing Scheme. Additionally, an = encoding methodology is proposed to standardize transmission and storage = of shares. >=20 > Complete BIP: = https://github.com/whitslack/btctool/blob/bip/bip-xxxx.mediawiki >=20 > I am looking to have this BIP assigned a number and added to the = bitcoin/bips repository. I invite any comments, questions, or = suggestions. >=20 > = --------------------------------------------------------------------------= ---- > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development --Apple-Mail=_0D199B2A-11D7-4450-8D8D-34393DBAE4AC Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIcBAEBAgAGBQJTNo2fAAoJED0hT49bxe1zgt0P/iyJV5Vxxqhi6LLVwRMU+S5X vWh7BkGsYk1EEq+EokmQkaVQoLNUj93Z0TnhtHa1T1LFbpMkycJLpgl5qPeU3uz4 7hw0yb5OeNSGKz8NaceaMDmJ+FUDjiqRntbmv6DZOiLL3cfOAl9A1C1zEQ9MLJR6 5hyjU21tKF85cvxUhdDz2DTyAjt1eE3nVpmfo4UIYvDsQgYBng4OkUV4WedKVyhW q2HyfblDcmIKEmLbftDnZCM6ixQbeBeQgAxWaqks06sSBXT38NJj5mGMonTAHloN wCNAv+xyC8GYgAymt/Wnlf1KrvrItFFMegWN5J0MvTpwQ6rQP2yRAqtSJmy09QiW XsOK+aZYrW50r4jDikZPtO6h8TsAvf2uJ7tya16WaVyqgbCh4an5D9p7gFP0Hl/c SMa4eIhspUJG5zMkI5zwTGfrF9qGkE3oae3C4lfqrRSAhj9A6qZO+NEe8IWNxg1W KetePBwaooTRzEE2Mnh5DNGbKUvCGgr+mlopLhjMJWikwLDtVeXZT0iY8NajOyNi lqZ5G4eZCeirDVUCRqaC4ETzltGNBaxTqwk75tCXMoCQtmCL33FaVDC313FTYUGl Hlc3NMUVyWumgMzghFZWJ05Xh+A0SpwBX4hJFgmerkP0ywRLmkm8s5lJivZrx0cm PNLY9fldCwnXDiIlDrjs =pLYH -----END PGP SIGNATURE----- --Apple-Mail=_0D199B2A-11D7-4450-8D8D-34393DBAE4AC--