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Machines watch you surf the web


There’s something coming through the Wi-Fi that you didn’t ask for. It’s watching what you do. It’s there when you open those “private” emails or post on a friend’s wall. It talks to you, even if you don’t realize it. And what’s worse, you’re talking back.

But no one is hiding behind your computer screen, secretly tracking your movements through the net. That task has been left to the computers and a technique called machine learning.