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How secure is blockchain really?

It turns out “secure” is a funny word to pin down.
by Mike Orcutt

The whole point of using a blockchain is to let people—in particular, people who don’t trust one another—share valuable data in a secure, tamperproof way. That’s because blockchains store data using sophisticated math and innovative software rules that are extremely difficult for attackers to manipulate. But the security of even the best-designed blockchain systems…

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