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 1WcWLn-000421-4F for bitcoin-development@lists.sourceforge.net; Tue, 22 Apr 2014 08:46:47 +0000 X-ACL-Warn: Received: from qmta05.westchester.pa.mail.comcast.net ([76.96.62.48]) by sog-mx-4.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1WcWLH-0005kk-Bz for bitcoin-development@lists.sourceforge.net; Tue, 22 Apr 2014 08:46:46 +0000 Received: from omta04.westchester.pa.mail.comcast.net ([76.96.62.35]) by qmta05.westchester.pa.mail.comcast.net with comcast id swjm1n0010ldTLk55wjmps; Tue, 22 Apr 2014 08:43:46 +0000 Received: from crushinator.localnet ([IPv6:2601:6:4800:47f:219:d1ff:fe75:dc2f]) by omta04.westchester.pa.mail.comcast.net with comcast id swjl1n00F4VnV2P01wjmyk; Tue, 22 Apr 2014 08:43:46 +0000 From: Matt Whitlock To: jan.moller@gmail.com Date: Tue, 22 Apr 2014 04:43:45 -0400 Message-ID: <3412253.yhU6ROQD4n@crushinator> User-Agent: KMail/4.13 (Linux/3.12.13-gentoo; KDE/4.13.0; x86_64; ; ) In-Reply-To: References: <2336265.urqHVhRi8n@crushinator> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 [76.96.62.48 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: 1WcWLH-0005kk-Bz Cc: bitcoin-development 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: Tue, 22 Apr 2014 08:46:47 -0000 On Tuesday, 22 April 2014, at 10:39 am, Jan M=C3=B8ller wrote: > Necessary Shares =3D M+1, not a problem >=20 > I would probably encode N-of-M in 1 byte as I don't see good use case= s with > more than 17 shares. Anyway, I am fine with it as it is. I agree that M > 16 is probably not a viable use case for human beings,= but machines would probably be able to make use of it. I, for one, wel= come our new robot overlords. Also, the byte that encodes M=E2=88=921 is optional, so if you're conce= rned about space, you can omit it (and the checksum).