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 \(1874\))
From: Chris Beams <chris@beams.io>
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
Subject: Re: [Bitcoin-development] Presenting a BIP for Shamir's Secret
	Sharing of Bitcoin private keys
Precedence: list


--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 <bip@mattwhitlock.name> =
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
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=pLYH
-----END PGP SIGNATURE-----

--Apple-Mail=_0D199B2A-11D7-4450-8D8D-34393DBAE4AC--