US Patent 9240891 Hybrid authentication

A hybrid authentication device that has a keypad, a display, an electronic communications interface and a processor and memory that can be removable, such as a Subscriber Identity Module. The device can operate in a stand-alone mode, in which a user enters a personal identification number and challenge using the keypad, and the device generates a response. The device can also function as a smartcard, and can be electronically coupled to an external device using the communications interface.