Revelations about NSA spying have left people wondering about the privacy of their digital data. But what about the privacy of their faces? Some agencies and states are working to increase sharing of mug shots and department of motor vehicles photos. But as of right now, we simply don't have a universal database of faces. Or ... do we?
Look at Facebook, says Amie Stepanovich, director of the domestic surveillance project at the Electronic Privacy Information Center in Washington, D.C. Facebook has the largest biometric database in the world — "and it's all been formed by people voluntarily submitting pictures to Facebook and identifying who they belong to," she says.
Theoretically, every time you label faces by tagging a picture, you're chipping away at those two big challenges for universal facial recognition. First, you're helping to build a super-database of labeled faces. Second, you're uploading multiple versions of each person's face, which can improve a system's accuracy. A bigger facial recognition database could allow Facebook to collect more data about whom we are interacting with in the real world.