On Thu, Oct 24, 2013 at 9:23 PM, Pieter Wuille <pieter.wuille@gmail.com> wrote:

This is a proposal I wrote a year ago, but never spent enough work to
push it as a standard:
https://bitcointalk.org/index.php?topic=102349.0

I think that PoW concept in your proposal is quite smart! However the problem that it isn't bidirectional; it don't allow to convert back and forth between mnemonic and seed, which was one of basic requirement for such algorithm.

slush