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From: Gregory Maxwell <greg@xiph.org>
Date: Mon, 11 Dec 2017 23:11:24 +0000
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To: Tier Nolan <tier.nolan@gmail.com>, 
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
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On Mon, Dec 11, 2017 at 10:41 PM, Tier Nolan via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
> There is a method called "high hash highway" that allows compact proofs of
> total POW.

That provides no security without additional consensus enforced
commitments, so I think pretty off-topic for this discussion.