Wi-Fi signals operate over radio waves, which are highly sensitive to interference from metallic objects. A strategically placed metal barrier — such as one made out of tin foil —

So how paranoid should you be about being monitored? If you’re using a company computer (or wifi connection), your employer can not only monitor your work email and projects, but

The Best Way to Block a Wi-Fi Signal Click the network icon in the lower right corner of your screen by the clock. Click “Open Network and Sharing Center.” Click