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I would love to. And in fact I already completed most of the implementation (excluding unit tests). Unfortunately, it seems like this is not going to happen because the Steemit team rejected the proposal due to its complexity in favor of just simple recovery from lost password by a single recovery agent specified beforehand (and as it stands so far, in that simplified proposal there are no user adjustable time limits and a compromised posting or active authority can prevent recovery, both of which I think are big mistakes).