Eugene Vasserman is uneasy about his digital pedometer. The company that makes the thing doesn't know his name, age, or gender, but it does track his every step and his location. “They know where I sleep. They know my address,” says the Kansas State University cybersecurity and privacy researcher.
Some might think he's paranoid. But he hasn't stopped using the device. It's just that he sees the worst-case scenario — and he's adamant that the rest of us should see it too. Once health data leaves your immediate possession, he explains, it's out of your control.