I'm addressed the topic of blockchains a couple of times recently, mostly in relation to badges and certificates. But as Audrey Watters writes here, it may be too early to determine whether there's any 'there' there. "But with news this week that Sony plans to launch a testing platform powered by blockchain and that IBM plans to offer 'blockchain-as-a-service,'" it might be time to take the phenomenon more seriously. Blockchain is the technology behind digital currencies and they basically register transactions in an unchangeable way. Watters has questions and you can leave a comment there.)

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