Smartphones now compete over which could best secure your own keys. They encrypt your information, store the digital keys to unlock themselves on technical hardware, and even offer you fancy biometrics from fingerprints to faceprints . But many millions of smartphones stay open to an absurdly low-tech assault: a sly glance at a person’s telephone while they unlock it. 1 new study has quantified precisely how simple an Android-style unlock pattern–instead of a six-digit PIN or biometric unlock–makes the task of any over-the-shoulder snoop. read more