On Mon, Nov 4, 2013 at 3:26 PM, Peter Todd <p...@petertodd.org> wrote:
> The correct, and rational, approach for a miner is to always mine to
> extend the block that the majority of hashing power is trying to extend.
> The current relay rules don't give you that information at all, but they
> can if we do two things:
> 1) Relay all blocks that meet the PoW target. (as suggested in the
>    paper)
> 2) Relay block headers that nearly meet the PoW target.
> Mining strategy is now to mine to extend the first block you see, on the
> assumption that the earlier one probably propagated to a large portion
> of the total hashing power. But as you receive "near-blocks" that are
> under the PoW target, use them to estimate the hashing power on each
> fork, and if it looks like you are not on the majority side, switch.

Doesn't that mean that by selective blocking these near-PoW headers,
you can bias peers into preferring to mine on those with near-PoW
headers, turning the attack around? Of course, because of their size,
headers are likely much harder to slow down (in propagation speed)
than full blocks...


Android is increasing in popularity, but the open development platform that
developers love is also attractive to malware creators. Download this white
paper to learn more about secure code signing practices that can help keep
Android apps secure.
Bitcoin-development mailing list

Reply via email to