US Patent 7979714 Authentication and access control device

Authentication and access control device (104) includes a first security key sub-system (110, 112, 114, 116, 118). The first security key sub-system is responsive to an input signal for providing a first key code required for permitting a user access to a controlled resource. The device advantageously also includes a second security key sub-system (110, 112, 114, 116, 118) for providing a second key code different from the first key code. The second key code is useful for authenticating the user or facilitating secure use of a particular controlled resource (102).