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Cc: bitcoin-development@lists.sourceforge.net, Michael
Subject: Re: [Bitcoin-development] Punishing empty blocks?
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On Tuesday, May 29, 2012 3:28:56 PM Peter Vessenes wrote:
> I don't understand what the 20 byte keyhash is. Can you elucidate?

20 byte keyhashes are a fundamental building block of the Bitcoin protocol.

ripemd160(sha256(ecdsaPubKey))