Patent ID: 8702007

Claim:
A retrofitted smart card comprising: a certified smart card chip; a display; retrofitted emulation circuitry operative to enable said certified smart card chip to communicate information to said display notwithstanding that said certified smart card chip is configured for communication only with an external read/write device; and retrofit firmware for operating said certified smart card chip at least in the absence of an external read/write device; and a display control switch; wherein, upon actuation of the display control switch, voltage is supplied to the certified smart card chip thereby enabling the certified smart card chip to run the retrofit firmware, wherein the retrofit firmware can distinguish between operation in communication with the external read/write device and operation in a stand alone mode; wherein when the retrofit firmware detects operation in the stand-alone mode; I) the retrofit firmware controls communications to and from said certified smart card chip; II) the retrofit firmware employs clock signals received from a clock oscillator; III) the retrofit firmware operates the certified smart card chip for processing and displaying secure data on the display; IV) the retrofit firmware configures a display driver to display said secure data; V) the retrofit firmware sets a predetermined time duration on an interval timer; or VI) the retrofit firmware issues a single instruction which results in the sequence indicated below: a) a supply of electrical power to the certified smart card chip is terminated, thus disabling the retrofit firmware; and b) once the supply of electrical power to said certified smart card chip has been terminated and the retrofit firmware has been disabled, the display driver causes the display to display the secure data for a predetermined time duration; and c) at the end of the predetermined time duration, the supply of electrical power to said display is terminated.