An electronic device with a display and a fingerprint sensor may authenticate a user for a respective function. While access to one or more resources of the device is restricted, the device displays an irregular arrangement of shapes on the touch-sensitive display. The device receives input based on the displayed irregular arrangement of the shapes. In accordance with a determination that the input meets input pattern criteria, the device provides access to the one or more restricted resources. In accordance with a determination that the input does not meet the input pattern criteria, the devices forgoes providing access to the one or more restricted resources of the device.