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| author | Peter Todd <pete@petertodd.org> | 2017-09-07 14:09:02 -0400 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2017-09-07 18:09:12 +0000 |
| commit | 983028b22c1dc9b3648ff8f6f385f04b42f5de52 (patch) | |
| tree | dbda99c636ebccb4926789093527a24db5fddf15 | |
| parent | 52ea63655601d19adfa7a51adce0e487d1d72d1f (diff) | |
| download | pi-bitcoindev-983028b22c1dc9b3648ff8f6f385f04b42f5de52.tar.gz pi-bitcoindev-983028b22c1dc9b3648ff8f6f385f04b42f5de52.zip | |
Re: [bitcoin-dev] Proposal: Extended serialization format for BIP-32 wallets
| -rw-r--r-- | c4/073bc900ca5a8fb1b989b7aa82c5a1de9834a5 | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/c4/073bc900ca5a8fb1b989b7aa82c5a1de9834a5 b/c4/073bc900ca5a8fb1b989b7aa82c5a1de9834a5 new file mode 100644 index 000000000..0e736e15d --- /dev/null +++ b/c4/073bc900ca5a8fb1b989b7aa82c5a1de9834a5 @@ -0,0 +1,128 @@ +Return-Path: <pete@petertodd.org> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id 95ED3B10 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 7 Sep 2017 18:09:12 +0000 (UTC) +X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 +Received: from outmail149077.authsmtp.com (outmail149077.authsmtp.com + [62.13.149.77]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id E7039D3 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 7 Sep 2017 18:09:11 +0000 (UTC) +Received: from mail-c245.authsmtp.com (mail-c245.authsmtp.com [62.13.128.245]) + by punt23.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v87I99em014508; + Thu, 7 Sep 2017 19:09:09 +0100 (BST) +Received: from petertodd.org (ec2-52-5-185-120.compute-1.amazonaws.com + [52.5.185.120]) (authenticated bits=0) + by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v87I96hw083766 + (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); + Thu, 7 Sep 2017 19:09:07 +0100 (BST) +Received: from [127.0.0.1] (localhost [127.0.0.1]) + by petertodd.org (Postfix) with ESMTPSA id D9AE240122; + Thu, 7 Sep 2017 18:09:05 +0000 (UTC) +Received: by localhost (Postfix, from userid 1000) + id 1E960202B4; Thu, 7 Sep 2017 14:09:02 -0400 (EDT) +Date: Thu, 7 Sep 2017 14:09:02 -0400 +From: Peter Todd <pete@petertodd.org> +To: Jonas Schnelli <dev@jonasschnelli.ch>, + Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org> +Message-ID: <20170907180902.GC13727@fedora-23-dvm> +References: <0d405f5d-c0a4-bad7-b6c3-08ba4424bf17@satoshilabs.com> + <A806D2EB-744F-41A9-91C1-603F89E9005B@jonasschnelli.ch> +MIME-Version: 1.0 +Content-Type: multipart/signed; micalg=pgp-sha256; + protocol="application/pgp-signature"; boundary="aT9PWwzfKXlsBJM1" +Content-Disposition: inline +In-Reply-To: <A806D2EB-744F-41A9-91C1-603F89E9005B@jonasschnelli.ch> +User-Agent: Mutt/1.5.23 (2014-03-12) +X-Server-Quench: a4199ed4-93f7-11e7-801f-9cb654bb2504 +X-AuthReport-Spam: If SPAM / abuse - report it at: + http://www.authsmtp.com/abuse +X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR + aQdMdgUUC1AEAgsB AmEbWl1eUFR7WWQ7 bghPaBtcak9QXgdq + T0pMXVMcUg1veBUH XlkeWhp1cQMIcXty YAgzWnFSVREucVt0 + QRhTCGwHMGB9YGAe Bl1RJFFSdQcYLB1A alQxNiYHcQ5VPz4z + GA41ejw8IwAXED5S WgYWJFZACWsbAjM6 Sx0OVS4iB0wMQyQh + JgAnLVhUEkELN0wu eVUmQxoyEidXUVc8 V15EBCtUO0Jp +X-Authentic-SMTP: 61633532353630.1039:706 +X-AuthFastPath: 0 (Was 255) +X-AuthSMTP-Origin: 52.5.185.120/25 +X-AuthVirus-Status: No virus detected - but ensure you scan with your own + anti-virus system. +X-Spam-Status: No, score=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW + autolearn=disabled version=3.3.1 +X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on + smtp1.linux-foundation.org +Subject: Re: [bitcoin-dev] Proposal: Extended serialization format for + BIP-32 wallets +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Protocol Discussion <bitcoin-dev.lists.linuxfoundation.org> +List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe> +List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/> +List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org> +List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help> +List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe> +X-List-Received-Date: Thu, 07 Sep 2017 18:09:12 -0000 + + +--aT9PWwzfKXlsBJM1 +Content-Type: text/plain; charset=utf-8 +Content-Disposition: inline +Content-Transfer-Encoding: quoted-printable + +On Thu, Sep 07, 2017 at 09:47:16AM -0700, Jonas Schnelli via bitcoin-dev wr= +ote: +> Thanks for the proposal. +>=20 +> Three points it could see as possible improvements: +>=20 +> 1. +> From what I know, the exact birthday in seconds doesn=E2=80=99t matter th= +at much therefore it may be possible to just use 13 or 16bits to create a r= +epresentation in week from 2009-01-09 00:00 UTC. 13bits would give you 157 = +years. +> Always round down to the beginning of the week when the key was created. +> But not sure if it=E2=80=99s worth to save ~two bytes for that. +> Also not sure if the key-birthday in seconds could have a security or pri= +vacy implication (week maybe better). + +Note how private key birthday is a potential privacy issue in certain cases. +Rare of course, because usually you don't release your private keys! But us= +ers +will on occasion have those keys be compromised. + +Personally, I'd advocate rounding down to month-level resolution, as that +should be both enough to handle any likely reorg scenario, and it's still a +precision that won't add much extra scanning ot any reasonably old (~1yr) +wallet. + +Note also how if transactions created with private keys in a seed use +nLockTime, you can ensure coins won't exist in a block older than the seed +birthday by simply ensuring that nLockTime is set to a more recent date then +that birthday under all circumstances. + +--=20 +https://petertodd.org 'peter'[:-1]@petertodd.org + +--aT9PWwzfKXlsBJM1 +Content-Type: application/pgp-signature; name="signature.asc" +Content-Description: Digital signature + +-----BEGIN PGP SIGNATURE----- + +iQEcBAEBCAAGBQJZsYs8AAoJECSBQD2l8JH7RFwH/1jKoPajttjH8BlRBesyIgb+ +CH20efFM3OhvwXer4/a9nUGi4JisFbxSnatF4Ujp+uPeDBTk3vr6lgf04Q3fvHSu +KGWkZZrLnR3FoGVTzCQ32+ubZpr8eKC7OkIDPdj39O93Y1/JPGnFx4Bf2pHVG7tb +ugcpGzEFgk2xJiqUeYp10PaoNcsHibzJLBN9J3JguqiuDY7XQ56q+R03DjahB6Gn +tCrEstma4jU7yewsduFaQH3SyLKLV5mN1gTSK5E5/fstjIC/M3scvuk2oeQdPI1I +NT69RmGFALGrTW2tP6qW+CL1sa5OBZKllG9PVuBI8Ao043ff3GXjxlvB2UNfP+k= +=kiSk +-----END PGP SIGNATURE----- + +--aT9PWwzfKXlsBJM1-- + |