From: Gary Rowe <gary.rowe@bitcoin-solutions•co.uk>
To: Bitcoin Development <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Electrum 2.0 has been tagged
Date: Thu, 12 Mar 2015 17:42:57 +0000 [thread overview]
Message-ID: <CAKm8k+29O9_Et-=g6QVLpL+9U8P7aNMN3-uNkj0Z=e+sXM4P9A@mail.gmail.com> (raw)
In-Reply-To: <CANEZrP2AhCfks7Q+16PHGB0ZEeWwbdbbQM_xj3ebrkgDBgbosg@mail.gmail.com>
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When Jim and I were selecting which combination of HD wallet structures to
support we noted the following:
* BIP39 is a good standard list to select from that mandates words that do
not look similar to each other, a certain spelling (no English US/UK
confusion) and possible foreign language variants provided by experts later
* BIP32 (m/0h/0/0) and BIP44 (m/44h/0h/0h/0/0) allow for maximum
compatibility with other wallets
* including a date in the "wallet words" themselves is open to spoofing
since the generator cannot be sure the date is correct (local time drift,
provided externally by untrusted third party etc)
* a timestamp as optional external metadata is useful to reduce sync times
in SPV
* our experience verified that users will very often enter a timestamp
incorrectly (locale, fat fingers, bad memory etc) so we opted for "number
of days elapsed since Bitcoin genesis block with a modulo 97 checksum
appended" (e.g. 1850/07) to mitigate this
* if a user has no timestamp then blank is the only alternative (no
guessing) which is interpreted as "earliest possible BIP32 date"
* if restoring the user has to select where the "wallet words" came from
(e.g. MultiBit HD, Trezor, Mycelium etc)
Users will naturally assume that they can type their "wallet words" (a more
mainstream-friendly term than "seed phrase") into any wallet and with a bit
of fiddling about get their bitcoins back. As wallet developers it is
within our capability to make that happen and I think we're quite close
already.
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next prev parent reply other threads:[~2015-03-12 17:43 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-01 15:23 Thomas Voegtlin
2015-03-02 7:09 ` Andreas Schildbach
2015-03-02 15:37 ` Mike Hearn
2015-03-02 17:11 ` Jim
2015-03-11 14:58 ` Thomas Voegtlin
2015-03-11 15:31 ` Andreas Schildbach
2015-03-12 8:56 ` Thomas Voegtlin
2015-03-11 17:14 ` Mike Hearn
2015-03-11 19:04 ` Jim
2015-03-11 19:24 ` Ricardo Filipe
2015-03-11 19:46 ` Gregory Maxwell
2015-03-11 22:57 ` Aaron Voisine
2015-03-11 23:22 ` Mike Hearn
2015-03-11 23:50 ` devrandom
2015-03-11 23:54 ` Mike Hearn
2015-03-12 0:11 ` Gregory Maxwell
2015-03-12 2:41 ` devrandom
2015-03-12 4:09 ` Gregory Maxwell
2015-03-12 19:08 ` Bryan Bishop
2015-03-12 10:30 ` Andreas Schildbach
2015-03-12 10:28 ` Andreas Schildbach
2015-03-18 2:06 ` devrandom
2015-03-12 10:41 ` Andreas Schildbach
2015-03-12 3:43 ` slush
2015-03-12 16:47 ` Mike Hearn
2015-03-12 17:20 ` Gary Rowe
2015-03-12 17:42 ` Gary Rowe [this message]
2015-03-12 18:27 ` Natanael
2015-03-12 18:51 ` Andreas Schildbach
2015-03-12 19:14 ` Natanael
[not found] <1353069350.4360497.1426126034565.JavaMail.yahoo@mail.yahoo.com>
2015-03-12 2:16 ` Thy Shizzle
2015-03-12 3:59 ` Neill Miller
[not found] <372541993.4372759.1426123313134.JavaMail.yahoo@mail.yahoo.com>
2015-03-12 2:26 ` devrandom
2015-03-12 2:38 Thy Shizzle
2015-03-12 10:43 ` Andreas Schildbach
2015-03-12 4:21 Thy Shizzle
2015-03-12 11:51 ` Neill Miller
2015-03-12 12:59 ` Thy Shizzle
2015-03-12 16:39 ` devrandom
2015-03-12 5:12 Thy Shizzle
2015-03-12 5:25 ` Aaron Voisine
2015-03-12 5:58 Thy Shizzle
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