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This article by Sarah Pritzker first appeared on
You might be somewhat familiar with the idea of blockchains, or you might have only heard of the phrase in passing (or you might not have any idea what a blockchain is but thought the article title sounded more interesting than the topic currently being discussed in the meeting your supervisor is making you sit through…). Either way, there are still a lot of questions that you probably have.
 What is a blockchain?
How does a blockchain actually work?
Are blockchains really as secure as they claim to be?

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