Because the mnemonic is an encoding of a 128-bit random number using its hash as a private key (or derived part of one) is not a problem, its just an alternate alphabet encoding of the random private key.
Not being able to generically understand the checksum. Seems tricky to solve other than say brute force eg H(mnemonic||1) mod 2^k == 0 where k is the amount of check digit redundancy. But that might be expensive for a trezor if k is very big at all. And then key = H(mnemonic). Adam On Mon, Jan 20, 2014 at 05:35:02PM -0500, Peter Todd wrote: >On Mon, Jan 20, 2014 at 04:05:14PM -0600, Brooks Boyd wrote: >> On Mon, Jan 20, 2014 at 11:42 AM, slush <sl...@centrum.cz> wrote: >> >> > Hi all, >> > >> > during recent months we've reconsidered all comments which we received >> > from the community about our BIP39 proposal and we tried to meet all >> > requirements for such standard. Specifically the proposal now doesn't >> > require any specific wordlist, so every client can use its very own list of >> > preferred words. Generated mnemonic can be then applied to any other >> > BIP39-compatible client. Please follow current draft at >> > https://github.com/trezor/bips/blob/master/bip-0039.mediawiki. >> >> So, because the [mnemonic]->[bip32 root] is just hashing, you've >> effectively made your "mnemonic sentence" into a brainwallet? Since every >> mnemonic sentence can now lead to a bip32 root, and only the client that >> created the mnemonic can verify the mnemonic passes its checksum (assuming >> all clients use different wordlists, the only client that can help you if >> you fat-finger the sentence is the client that created it)? > >That issue is more than enough to get a NACK from me on making the >current BIP39 draft a standard - I can easily see that leading to users >losing a lot of money. > >Have any wallets implemented BIP39 this way already in released code? > >-- >'peter'[:-1]@petertodd.org >00000000000000009c3092c0b245722363df8b29cfbb86368f4f7303e655983a >------------------------------------------------------------------------------ >CenturyLink Cloud: The Leader in Enterprise Cloud Services. >Learn Why More Businesses Are Choosing CenturyLink Cloud For >Critical Workloads, Development Environments & Everything In Between. >Get a Quote or Start a Free Trial Today. >http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk >_______________________________________________ >Bitcoin-development mailing list >Bitcoin-development@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/bitcoin-development ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
