Someone asked: Who is Adam Back?
My answer: Hashcash was originally designed to protect against spam and denial-of-service attacks: the sender had to solve a hash puzzle first. The core property of proof of work is that it’s “hard to compute, but easy to verify”: finding a hash that meets the requirements takes many attempts, but verifying it only takes one calculation.
$BTC 75970.54 (+0.18%)
Did you know about this before?

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