What is a 51% attack?

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We’ve just heard the news that ZenCash has experienced a 51% attack and before we’ve seen Verge, Monacoin, and Bitcoin Gold all face similar malicious occurrences.

I know what you’re thinking. “51%! An attack! How awful!”

Well, yes, but what actually does it mean?

Essentially it happens when a group of malicious miners manages to take authority of a cryptocurrency’s blockchain in a very particular manner of hacking.

This type of hacking can only occur on a blockchain – making


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