On Saturday, 29 March 2014, at 9:44 am, Tamas Blummer wrote: > I used Shamir's Secret Sharing to decompose a seed for a BIP32 master key, > that is I think more future relevant than a single key. > Therefore suggest to adapt the BIP for a length used there typically 16 or 32 > bytes and have a magic code to indicate its use as key vs. seed.
Master keys of 32 bytes would work as-is, as ordinary private keys are also 32 bytes. Secrets of other lengths could be supported if the function that generates a[i] from a[i-1] (which is presently SHA-256) were replaced with a function having parameterized output length, such as scrypt. Base58Check encodings of shares for secrets of lengths other than 32 bytes would have prefixes other than "SS", but that's not a huge concern. I suspect 32 bytes would be the most common secret length anyway, wouldn't you? ------------------------------------------------------------------------------ _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
