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Researchers create Android app to show when other apps track you

The app shows users when other apps are accessing their location

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A team of researchers has developed an Android app to help people better understand when their location is being accessed, something that happens more often than people think.

"All apps that access location need to request permission from the Android platform," Janne Lindqvist [cq], who led the research project, said via email. "The problem is that people don't pay attention to these default disclosures."

Android phones display a flashing GPS icon when apps are trying to access the user's location. But few people notice or understand what the icon is telling them, the researchers found.

The app they developed is designed to fix that, by making it clearer to users when other apps are accessing their location data. They tried several methods, including a message that flashes on the device's screen reading, "Your location is being accessed by [app name]."

There's no obvious way in Android for an app to monitor whether other apps are accessing location, the researchers said, but they discovered they could exploit a method in the Android Location API as "an effective side channel."

They're are in the process of readying their app for the Play Store. It doesn't have an official name yet, but the working title is the RutgersPrivacyApp. "I'm happy to hear suggestions for a better one," Lindqvist said.

They tested the app with a small group at Rutgers University in New Jersey. They said it was the first study to examine how people respond when apps tell them they're being tracked.

The issue of apps collecting data isn't new, and recent disclosures about government surveillance have shown that intelligence agencies might also be tracking data from apps. A recent report said mobile versions of Facebook, LinkedIn and Twitter were of interest to government spies.

Other research from Carnegie Mellon University in Pennsylvania has shown that seemingly harmless apps like Angry Birds and Dictionary.com have gathered some surprising types of information about their users, like their location and device ID.

At Rugers, the researchers wanted to learn how disclosures about location affected users' attitudes towards apps. They tested the app on several Android devices, using a variety of apps including Firefox and Tunein Radio.

Participants said they were surprised at some of the apps that accessed their location, and that some apps accessed their location more frequently than they would have expected.

Lindqvist hopes to make Android users more aware of location tracking so they can make better decisions about their privacy. He would also like Google to provide better privacy controls and notices in Android.

He said he focussed on Android rather than Apple's iOS partly because the process of publishing an app in the Google Play Store is simpler, he said.

Zach Miners covers social networking, search and general technology news for IDG News Service. Follow Zach on Twitter at @zachminers. Zach's e-mail address is zach_miners@idg.com



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