On Friday, 4 April 2014, at 10:51 am, Gregory Maxwell wrote: > On Fri, Apr 4, 2014 at 10:16 AM, Matt Whitlock <b...@mattwhitlock.name> wrote: > > Honestly, that sounds a lot more complicated than what I have now. I made > > my current implementation because I just wanted something simple that would > > let me divide a private key into shares for purposes of dissemination to my > > next of kin et al. > > I suggest you go look at some of the other secret sharing > implementations that use GF(2^8), they end up just being a couple of > dozen lines of code. Pretty simple stuff, and they work efficiently > for all sizes of data, there are implementations in a multitude of > languages. There are a whole bunch of these.
Okay, I will. > > Do you have a use case in mind that would benefit from byte-wise operations > > rather than big-integer operations? I mean, I guess if you were trying to > > implement this BIP on a PIC microcontroller, it might be nice to process > > the secret in smaller bites. (No pun intended.) But I get this feeling that > > you're only pushing me away from the present incarnation of my proposal > > because you think it's too similar (but not quite similar enough) to a > > threshold ECDSA key scheme. > > It lets you efficiently scale to any size data being encoded without > extra overhead or having additional primes. It can be compactly > implemented in Javascript (there are several implementations you can > find if you google), it shouldn't be burdensome to implement on a > device like a trezor (much less a real microcontroller). Those are fair points. > And yea, sure, it's distinct from the implementation you'd use for > threshold signing. A threshold singing one would lack the size agility > or the easy of implementation on limited devices. So I do think that > if there is to be two it would be good to gain the advantages that > can't be achieved in an threshold ECDSA compatible approach. I agree. I'll look into secret sharing in GF(2^8), but it may take me a few days. ------------------------------------------------------------------------------ _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
