Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WToTf-0005PR-77 for bitcoin-development@lists.sourceforge.net; Sat, 29 Mar 2014 08:18:55 +0000 X-ACL-Warn: Received: from qmta12.westchester.pa.mail.comcast.net ([76.96.59.227]) by sog-mx-1.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1WToTd-0005to-Af for bitcoin-development@lists.sourceforge.net; Sat, 29 Mar 2014 08:18:55 +0000 Received: from omta19.westchester.pa.mail.comcast.net ([76.96.62.98]) by qmta12.westchester.pa.mail.comcast.net with comcast id jL5F1n00127AodY5CL5JWP; Sat, 29 Mar 2014 08:05:18 +0000 Received: from crushinator.localnet ([IPv6:2601:6:4800:47f:219:d1ff:fe75:dc2f]) by omta19.westchester.pa.mail.comcast.net with comcast id jL5H1n00J4VnV2P3fL5H0D; Sat, 29 Mar 2014 08:05:17 +0000 From: Matt Whitlock To: bitcoin-development@lists.sourceforge.net Date: Sat, 29 Mar 2014 04:05:17 -0400 Message-ID: <1878927.J1e3zZmtIP@crushinator> User-Agent: KMail/4.12.3 (Linux/3.12.13-gentoo; KDE/4.12.3; x86_64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [76.96.59.227 listed in list.dnswl.org] 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: 1WToTd-0005to-Af Subject: [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 08:18:55 -0000 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. Complete BIP: https://github.com/whitslack/btctool/blob/bip/bip-xxxx.mediawiki I am looking to have this BIP assigned a number and added to the bitcoin/bips repository. I invite any comments, questions, or suggestions.