Re:It's Time For a Hard Bitcoin Fork
by wmf on Friday June 13, 2014 @04:31PM
(#7890692)
You'd see that every single block was mined by the same pool.
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That doesn't mean a 51% attack happened, it just means someone got 51% of the network hash rate.
An honest miner with 51% of the hash rate would only mine 51% of the blocks (example: https://blockchain.info/blocks ); an attacker would mine every single block.