Here's something lots of people like about Bitcoin: Governments can't control it. You can spend your Bitcoin the way you want to, and nobody can stop you. But here's the bad news: That's not true. It turns out that one of the things everybody believes about cryptocurrency is actually wrong. Really wrong. About a year ago, Trail of Bits was engaged by DARPA, the Defense Advanced Research Projects Agency to answer a question. DARPA wanted to know if one of the things that everybody "knows" about cryptocurrency is actually true: Are blockchains really decentralized? This is a key question for cryptocurrencies. And in this episode, we'll explain what the Trail of Bits team found.