Michael Calore: We are joined this week once again by WIRED senior writer Andy Greenberg. Andy, welcome back to the show.
Michael Calore: We are joined this week once again by WIRED senior writer Andy Greenberg. Andy, welcome back to the show. Andy Greenberg: Thanks to you both for having me on again. Michael Calore: It's great to have you back. We're talking about cryptocurrency again on today's show, but it's not really in the way that you might expect. Andy, at the end of last year, you published a book. It's called Tracers in the Dark. It's filled with stories about investigators who have been able to track down criminals by studying their cryptocurrency transactions. These are people who operated on the dark web, places like Silk Road, AlphaBay, and Welcome to Video, a site where users shared child sex abuse videos. These criminal enterprises were funded and fueled by cryptocurrency, primarily bitcoin . Now, since bitcoin has existed, people have been using it to buy and sell all sorts of legal and illegal things online. They may not see that behavior as risky if they'...