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From: Michael Gronager <gronager@ceptacle.com>
To: bitcoin-development@lists.sourceforge.net
Subject: Re: [Bitcoin-development] BIP0032
Date: Mon, 27 May 2013 15:10:04 +0200	[thread overview]
Message-ID: <51A35B2C.7060802@ceptacle.com> (raw)
In-Reply-To: <51A32A30.8040504@ceptacle.com>

Commenting on my own mail...

Rereading the BIP, it occurs to me that the private derivation is
actually intentional. So:
(m/i/j/k)*G = (M/i/j/k), but (m/i'/j/k)*G <> (M/i/j/k) (M/i'/j/k => ERROR)

But: ((m/i')*G)/j/k = (m/i'/j/k)*G

So, the motivation for the private derivation is to avoid the known (K,
c) and known k_i => k known too! I fear that many will fall in this
trap, though...

/Michael





  reply	other threads:[~2013-05-27 13:10 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-27  9:41 [Bitcoin-development] BIP0032 Michael Gronager
2013-05-27 13:10 ` Michael Gronager [this message]
2013-05-27 13:39   ` Michael Gronager
2013-05-27 17:21     ` Amir Taaki
2013-05-27 20:45   ` Pieter Wuille
2013-05-28  5:16 Tamas Blummer

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