Securisation of an element for storing binary data, check register and a smart card

摘要

The element (60) has an input unit for inputting signal representing binary data, and a unit for providing output signal (Q) whose state represents data stored in the element. A detecting unit detects a service attack of validation signal (ENA) or signal internal to the element. A terminal receives the validation signal. A generating unit generates switching signal (S2) whose state represents switching of the output signal from a low state to an upper state.