The Department of Homeland Security tapped a little-known ad firm to produce Kristi Noem’s multimillion-dollar ad campaign during the government shutdown last year. But when asked to explain her ...

VPNs encrypt your traffic, but they aren't blind to your activity. Here's the metadata your provider can see—and how to spot services that misuse it. I’ve been writing about technology since 2012, ...

Most Americans know their ZIP code by heart. They type it into online forms, scribble it on envelopes and memorize it as part ...