What is blockchain, and what do CIOs need to know about how it can improve healthcare? It’s a question that’s both straightforward and complex.There’s a forum on Reddit called Explain Like I’m Five. And there’s plenty of discussion there about the basic concepts behind distributed ledger technology, from the mechanics of how it’s designed to the real-world problems it could solve.But one of the best explainers we’ve seen is one from Wired, where a blockchain expert literally explains how it works to a child (and, with ever-mounting layers of complexity, to a teenager, a college student, a grad student and a fellow expert).At its essence, of course, blockchain is a network to enable easier peer to peer exchange and reduce dependence on intermediaries. As blockchain researcher Bettina Warburg explained to the girl, it’s “a type of technology that means you could trade with any kid, all over the world you don’t need the store and you don’t even necessarily need to know the other person.”

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