ELECTRONIC DEVICE AND AUTHENTICATION METHOD

According to one embodiment, a device gives a higher priority to a user when first authentication is successfully carried out than when second authentication is successfully carried out. The device includes a nonvolatile memory which stores a first password used for the first authentication, a position detector which detects a present position of the device, a first display processor which display a first input screen for accepting a third password input when the device is activated, and a second display processor which displays a second input screen for accepting the third password input, when the third password, which is input by using an input module when the first screen is displayed, is determined to be the first password and the present position is out of the permissible range.