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| author | Gregory Maxwell <gmaxwell@gmail.com> | 2012-12-04 22:50:17 -0500 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2012-12-05 03:50:33 +0000 |
| commit | 185227467439eb7cdc9b81293e414587b924255f (patch) | |
| tree | 4852dbc1413d8a2a9b828c73f5661b6881e82f2a | |
| parent | 336d16f5a54096064bafb2450a86d16c1a4e0940 (diff) | |
| download | pi-bitcoindev-185227467439eb7cdc9b81293e414587b924255f.tar.gz pi-bitcoindev-185227467439eb7cdc9b81293e414587b924255f.zip | |
[Bitcoin-development] String-based Hierarchical Deterministic Keys - Alternative to BIP 32
| -rw-r--r-- | 52/83bd91cb1749a3ad3623c99dfee5c8ed032645 | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/52/83bd91cb1749a3ad3623c99dfee5c8ed032645 b/52/83bd91cb1749a3ad3623c99dfee5c8ed032645 new file mode 100644 index 000000000..fd37eeea5 --- /dev/null +++ b/52/83bd91cb1749a3ad3623c99dfee5c8ed032645 @@ -0,0 +1,95 @@ +Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] + helo=mx.sourceforge.net) + by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) + (envelope-from <gmaxwell@gmail.com>) id 1Tg60H-0004sh-Es + for bitcoin-development@lists.sourceforge.net; + Wed, 05 Dec 2012 03:50:33 +0000 +Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com + designates 209.85.223.174 as permitted sender) + client-ip=209.85.223.174; envelope-from=gmaxwell@gmail.com; + helo=mail-ie0-f174.google.com; +Received: from mail-ie0-f174.google.com ([209.85.223.174]) + by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) + (Exim 4.76) id 1Tg606-0000Sc-PV + for bitcoin-development@lists.sourceforge.net; + Wed, 05 Dec 2012 03:50:33 +0000 +Received: by mail-ie0-f174.google.com with SMTP id c11so7427943ieb.19 + for <bitcoin-development@lists.sourceforge.net>; + Tue, 04 Dec 2012 19:50:17 -0800 (PST) +MIME-Version: 1.0 +Received: by 10.50.178.8 with SMTP id cu8mr609895igc.5.1354679417541; Tue, 04 + Dec 2012 19:50:17 -0800 (PST) +Received: by 10.64.171.73 with HTTP; Tue, 4 Dec 2012 19:50:17 -0800 (PST) +In-Reply-To: <CAAS2fgSvEy9qgyEgWui1Z_qD+qbRH3=CqY+ZJu6ki1T=kxB6-Q@mail.gmail.com> +References: <CAErK2CgWFarfs1WhGHs2L0b6ZuqCMhu72+dLNj0EZ1vN8=Au=g@mail.gmail.com> + <CAAS2fgQxQEAtspRQixU7KAqhcXYnev=20-hbDpMCO9nTEKT+RQ@mail.gmail.com> + <CACsn0cnwyWL2NL9eEboxqgTS-h5MS+LHajKOYpFiCXCBs6pLug@mail.gmail.com> + <CAAS2fgSvEy9qgyEgWui1Z_qD+qbRH3=CqY+ZJu6ki1T=kxB6-Q@mail.gmail.com> +Date: Tue, 4 Dec 2012 22:50:17 -0500 +Message-ID: <CAAS2fgRfAJhqhgxRzZ6fyBdOBCGtTb5OXJO0gEbTry8KxvXvCg@mail.gmail.com> +From: Gregory Maxwell <gmaxwell@gmail.com> +To: bitcoin-development@lists.sourceforge.net +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable +X-Spam-Score: -0.2 (/) +X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. + See http://spamassassin.org/tag/ for more details. + -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for + sender-domain + 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider + (gmaxwell[at]gmail.com) + 0.0 DKIM_ADSP_CUSTOM_MED No valid author signature, adsp_override is + CUSTOM_MED + -0.0 SPF_PASS SPF: sender matches SPF record + 0.1 DKIM_SIGNED Message has a DKIM or DK signature, + not necessarily valid + 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid + 1.2 NML_ADSP_CUSTOM_MED ADSP custom_med hit, + and not from a mailing list +X-Headers-End: 1Tg606-0000Sc-PV +Subject: [Bitcoin-development] String-based Hierarchical Deterministic Keys + - Alternative to BIP 32 +X-BeenThere: bitcoin-development@lists.sourceforge.net +X-Mailman-Version: 2.1.9 +Precedence: list +List-Id: <bitcoin-development.lists.sourceforge.net> +List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe> +List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development> +List-Post: <mailto:bitcoin-development@lists.sourceforge.net> +List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help> +List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe> +X-List-Received-Date: Wed, 05 Dec 2012 03:50:33 -0000 + +On Tue, Dec 4, 2012 at 10:36 PM, Watson Ladd <wbl@uchicago.edu> wrote: +> being able to spend +> a coin sent to an address generated by this scheme implies being able +> to spend any coin generated +> by this scheme. + +If you have the the full extended secret there then you can spend +along the chain=E2=80=94 but just the plain ecdsa secret by itself is not +enough to spend anything but that address itself. + +Or have I misunderstood you here? + +> The easiest deterministic wallet construction is simply to use a +> stream cipher to generate random +> bytes used as the private keys in a wallet. Hierarchical constructions +> do not seem to me to add more, +> other then distinguishing transactions by sending to unique addresses, +> which could be done by other means. + +Sadly that construction has no ability to separate address generation +from spending=E2=80=94 an important element for merchant applications. Not +just for their own own distinguishing of transactions but because the +use of fresh addresses is essential to the limited privacy properties +of the Bitcoin system. + +I called that a type-1 deterministic wallet in some old forum post +where I wrote about the different derivation schemes as opposed to the +point combining type-2 construction. The hope in BIP32 was that we +could get away just using a single one. + + |