Since the end of the Cold War, businesses have built an awe-inspiring global infrastructure. Digital pipelines move vast amounts of capital and data around the world, and supply chains crisscross international boundaries in a spider web of commerce. An intricate system of networks keeps the global economy running smoothly, but it’s easy to take for ...

In August, the U.S. Treasury’s Office of Foreign Assets Control (OFAC) sanctioned the cryptocurrency platform Tornado Cash, a virtual currency “mixer” designed to make it harder to trace cryptocurrency transactions—and a worldwide favorite money-laundering platform. Americans are now forbidden from using it. According to the U.S. government, Tornado Cash was sanctioned because it allegedly laundered ...