The Fingerprint Lock on Your Phone Isn’t Cop-Proof

The FBI’s feud with Apple over access to Syed Farook’s iPhone might never have happened if the San Bernardino, Calif., shooter had been carrying a 5S or newer. For the 250 million phones sold around the world with fingerprint authentication since 2013, law enforcement may be able to compel suspects to press their fingers to the devices and unlock them.

With minimal litigation on the books in the U.S., police and prosecutors require only a judge’s blessing on a warrant for a suspect’s fingerprints. So far they’ve used the power sparingly. But as the number of fingerprint scanners in hip pockets grows, district attorneys across the country say the technology is poised to become a major engine of evidence-gathering. “It is likely to be just a matter of time till this does become a primary gateway to accessing phones,” says Micheal O’Connor, an Alameda County assistant district attorney in Oakland, Calif.