By KATE MURPHYPublished: August 11, 2010
When Adam Savage, host of the popular science program “MythBusters,” posted a picture on Twitter of his automobile parked in front of his house, he let his fans know much more than that he drove a Toyota Land Cruiser.
Embedded in the image was a geotag, a bit of data providing the longitude and latitude of where the photo was taken. Hence, he revealed exactly where he lived. And since the accompanying text was “Now it’s off to work,” potential thieves knew he would not be at home. ...
... The Web site ICanStalkU.com provides step-by-step instructions for disabling the photo geotagging function on iPhone, BlackBerry, Android and Palm devices. A person’s location is also revealed while using services like Foursquare and Gowalla as well as when posting to Twitter from a GPS-enabled mobile device, but the geographical data is not hidden as it is when posting photos. ...
... By downloading free browser plug-ins like the Exif Viewer for Firefox (addons.mozilla.org/en-US/firefox/addon/3905/) or Opanda IExif for Internet Explorer (opanda.com/en/iexif/), anyone can pinpoint the location where the photo was taken and create a Google map. Moreover, since multimedia sites like Twitter and YouTube have user-friendly application programming interfaces, or A.P.I.’s, someone with a little knowledge about writing computer code can create a program to search for geotagged photos in a systematic way. For example, they can search for those accompanied with text like “on vacation” or those taken in a specified neighborhood. ...
... Protecting your privacy is not just a matter of being aware and personally responsible, said Mr. Sommer, the researcher. A friend may take a geotagged photo at your house and post it. ...















