{"href":"https://api.simplecast.com/oembed?url=https%3A%2F%2Ftrailofbits.audio%2Fepisodes%2Fimmutable-Pkw9wZkh","width":444,"version":"1.0","type":"rich","title":"Immutable","thumbnail_width":300,"thumbnail_url":"https://image.simplecastcdn.com/images/30a2d041-1318-4f6d-b79a-d9facb77b603/df78f1c6-61b4-4003-9998-3c1a5c867142/161227-tob-logo-white.jpg","thumbnail_height":300,"provider_url":"https://simplecast.com","provider_name":"Simplecast","html":"<iframe src=\"https://player.simplecast.com/83ac90fd-6423-4fb8-9935-6b583b263535\" height=\"200\" width=\"100%\" title=\"Immutable\" frameborder=\"0\" scrolling=\"no\"></iframe>","height":200,"description":"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. "}