[Bitcoin-development] Request for a new BIP number (and discussion): Improved HD wallet generation.

木ノ下じょな kinoshitajona at gmail.com
Sat Feb 21 13:32:30 UTC 2015


Yes.

That is similar to an idea at FC15 (
http://fc15.ifca.ai/preproceedings/paper_15.pdf) but instead of increasing
the number of keys needed up to m, and protecting against m-1 leaks. (so if
you have to give keys out to 10 departments you must store 11 keys, or 363
bytes, I have decided to leave it at 2 keys protecting 1 leak, and then
using convention to prevent calculating the master private key by requiring
all private keys AND all extended private keys (aka "nodes" in my proposal)
to be derived alone under their respective parents.

In theory this will prevent leakage of private keys from destroying the
entire HD wallet entirely.

Services like "Reality Keys" could be a perfect use case (he must release
private keys relating to the outcome, so he has decided against using BIP32
to generate addresses for the bets.

Any Cryptographers that would like to take a look at the math and see if
it's sound, I think I am properly breaking any linear relationships between
keys... but I would like a second opinion.

Thank you for your reply,
Jona

2015-02-21 22:23 GMT+09:00 Adam Back <adam at cypherspace.org>:

> Whats the objective?  Is it to require accidental disclosure of two
> private keys to compute the master private key?
>
> Adam
>
> On 21 February 2015 at 13:20, 木ノ下じょな <kinoshitajona at gmail.com> wrote:
> > Hello All,
> >
> > I have put together a proposal for a new generation methodology of HD
> > wallets.
> >
> > The method is a modification of BIP32, so if something is unclear or not
> > explicit, please assume it follows BIP32.
> >
> > I am looking forward to any and all criticism and help with writing /
> making
> > the BIP more secure.
> >
> > If some of my pseudo code / English is off I apologize, I am not good
> with
> > words.
> >
> > If this is deemed worthy enough to be drafted into a BIP, I would
> appreciate
> > if someone could tell me what the overall step by step flow would be.
> >
> > Thank you, I will paste the link to the proposal below.
> > Jona
> >
> > https://gist.github.com/dabura667/875bb2c159b219c18885
> >
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