Director of the Digital Currency Initiative at the MIT Media Lab. Interested in distributed systems, cryptography, cryptocurrencies, and programmable money.

Writings || Publications || CV || Bio

Recent News

I'll be speaking at the BIS Innovation Summit in Basel, Switzerland September 10-11, 2025.

Here's two recent DCI blog posts, one on stablecoin redemptions (many people don't seem to realize redemptions aren't open to all!) and another on timing in Bitcoin CoinJoin Whirlpool transactions.

Here is a video of a talk I gave at Bitcoin 2025 in Las Vegas titled Engineering Freedom: Getting to the First Billion Bitcoin Users. It's an overview of tradeoffs and techniques for scaling Bitcoin self-custody, for a general audience.

Here's an explanation of how Ark works. Ark is a design for users to share UTXOs on Bitcoin and make cheaper payments.

I joined USA Today's The Excerpt to talk about cash and digital payment systems.

I wrote a a reflection on 10 years of digital currency at MIT.