In September, Apple debuted the new iPhone 5s. Among the many updates (amazing camera! faster chip!) was the Touch ID sensor. With Touch ID, 5s owners use their fingerprints to unlock their phones and authorize payment for App Store, iTunes, and Newsstand downloads. It’s the first mainstream use of biometric security for consumers, which makes Touch ID a nifty feature. Apple says it’s secure: Fingerprint data is stored on a quarantined section of the phone’s processor, doesn’t sync with iCloud, and is blocked from third-party use. But the 5s probably won’t be the last device with biometric security. And that brings up a tough question: Have we reached the point where we’re giving away more to technology than we’re getting in return?