A method, comprising: at an electronic device with a fingerprint sensor and a display: displaying an unlock user interface while the electronic device is in a locked mode of operation; while displaying the unlock user interface, detecting a first input; in response to detecting the first input: in accordance with a determination that the first input satisfies a first authentication system, unlocking the device without providing access to first information of a respective application; in accordance with a determination that the first input does not satisfy the first authentication system, forgoing unlocking the device; while the electronic device is unlocked, activating the respective application; in response to activating the respective application, displaying, on the display, a respective user interface associated with the respective application that includes an obscured version of the first information; while displaying the obscured version of the first information on the display, detecting a finger input on the fingerprint sensor; and in response to detecting the finger input on the fingerprint sensor: in accordance with a determination that the finger input includes a fingerprint that matches a fingerprint of an authorized user, replacing display of the obscured version of the first information with an unobscured version of the first information; and in accordance with a determination that the finger input does not include a fingerprint that matches a fingerprint of an authorized user, maintaining display of the obscured version of the first information on the display. displaying an unlock user interface while the electronic device is in a locked mode of operation; while displaying the unlock user interface, detecting a first input; in response to detecting the first input: in accordance with a determination that the first input satisfies a first authentication system, unlocking the device without providing access to first information of a respective application; in accordance with a determination that the first input does not satisfy the first authentication system, forgoing unlocking the device; in accordance with a determination that the first input satisfies a first authentication system, unlocking the device without providing access to first information of a respective application; in accordance with a determination that the first input does not satisfy the first authentication system, forgoing unlocking the device; while the electronic device is unlocked, activating the respective application; in response to activating the respective application, displaying, on the display, a respective user interface associated with the respective application that includes an obscured version of the first information; while displaying the obscured version of the first information on the display, detecting a finger input on the fingerprint sensor; and in response to detecting the finger input on the fingerprint sensor: in accordance with a determination that the finger input includes a fingerprint that matches a fingerprint of an authorized user, replacing display of the obscured version of the first information with an unobscured version of the first information; and in accordance with a determination that the finger input does not include a fingerprint that matches a fingerprint of an authorized user, maintaining display of the obscured version of the first information on the display. in accordance with a determination that the finger input includes a fingerprint that matches a fingerprint of an authorized user, replacing display of the obscured version of the first information with an unobscured version of the first information; and in accordance with a determination that the finger input does not include a fingerprint that matches a fingerprint of an authorized user, maintaining display of the obscured version of the first information on the display.