On Sat, 2014-03-29 at 13:38 -0400, Matt Whitlock wrote: > On Saturday, 29 March 2014, at 10:25 am, Dev Random wrote: > > On Sat, 2014-03-29 at 11:44 -0400, Matt Whitlock wrote: > > > On Saturday, 29 March 2014, at 11:08 am, Watson Ladd wrote: > > > > https://freedom-to-tinker.com/blog/stevenag/new-research-better-wallet-security-for-bitcoin/ > > > > > > Thanks. This is great, although it makes some critical references to an > > > ACM paper for which no URL is provided, and thus I cannot implement it. > > > > > > A distributed ECDSA notwithstanding, we still need a way to decompose a > > > BIP32 master seed into shares. I am envisioning a scenario in which I > > > > It would seem that threshold ECDSA with keys derived from separate seeds > > has better security properties than one seed that is then split up. The > > main thing is that there is no single point of attack in the generation > > or signing. > > No contest here. But can threshold ECDSA work with BIP32? In other > words, can a threshold ECDSA public key be generated from separate, > precomputed private keys, or can it only be generated interactively? > Maybe the BIP32 master seeds have to be generated interactively, and > then all sets of corresponding derived keys are valid signing groups?
That's a good point. In the paper, they have a deterministic wallet scheme in section 3.3. It is non-interactive, so that's good. On the other hand, it's not BIP32, so that adds complexity. > > Threshold ECDSA certainly sounds nice, but is anyone working on a BIP > for it? I would take it on myself, but I don't understand it well > enough yet, and publicly available information on it seems lacking. I > proposed this Shamir Secret Sharing BIP as an easily understood, easily > implemented measure that we can use today, with no changes to existing > Bitcoin software. It's low-hanging fruit. Good points, although multisig is catching on quickly in the ecosystem. AFAIK, all production wallets can send to p2sh addresses. -- Miron / devrandom ------------------------------------------------------------------------------ _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
