What is a blockchain? Distributed ledger technology underlies cryptocurrencies like bitcoin and could be the future of money, security, and online privacy. But there's also a ton of hype.


A blockchain expert is accused of helping North Korea’s leaders. But what would they want from him?

The North Korean regime appears to see cryptocurrency as a shortcut to economic development.

North Korean leader Kim Jong-un speaks into a microphone.

Why a digital dollar isn’t coming anytime soon (or so the Fed says)

While central bank digital currencies may address problems in other countries, the US doesn’t have those problems, according to Fed chair Jerome Powell.

US Federal Reserve chairman Jerome Powell

Can photonic chips save Bitcoin?

Cryptocurrencies are famously energy hungry. So some researchers say the answer is a more energy-efficient form of computing.

photo of abstract light beams

Why it’s time to start talking about blockchain ethics

Blockchain technology is changing the nature of money and organizations. We should probably start pondering the potential consequences.

Blocks and scales of justice
What matters in Blockchain right now?

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