If you tweet a picture from your living room using your smartphone, you’re sharing far more than your new hairdo or the color of the wallpaper. You’re potentially revealing the exact coordinates of your house to anyone on the Internet.
The GPS location information embedded in a digital photo is an example of so-called metadata, a once-obscure technical term that’s become one of Washington’s hottest new buzzwords.
The word first sprang from the lips of pundits and politicians earlier this month, after reports disclosed that the government has been secretly accessing the telephone metadata of Verizon customers, as well as online videos, emails, photos and other data collected by nine Internet companies.
President Barack Obama hastened to reassure Americans that “nobody is listening to your phone calls,” while other government officials likened the collection of metadata to reading information on the outside of an envelope, which doesn’t require a warrant.
A raid by federal immigration authorities on Saturday in New York City was thwarted by about...
