Are picture passwords secure?
Picture passwords are as secure as PINs, which is pretty secure. The data is stored locally, so someone must have your device to use them. But you must keep in mind that picture passwords and PINs aren't really intended to provide an extra layer of security.
How does picture password work?
A picture password is a way of logging into Windows 10 that involves using a picture of your choosing and gestures drawn on that picture, instead of a password. These gestures can be a combination of circles, straight lines, and clicks or taps.