When asked, “Who is Adam Back?”
I usually answer like this: Hashcash was originally designed to prevent spam and denial-of-service attacks: senders had to solve a hash puzzle first. Hashcash uses computational cost to prevent mass spamming, while Bitcoin uses a similar idea to decide who maintains the ledger and to reward miners.
$BTC 77313.58(-0.64%)
What would you like to learn about? Let me know in the comments.

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