Card with input elements for entering a PIN code and method of entering a PIN code
A technology for inputting components and codes, applied in the field of card readers, to achieve the effect of large variable range, convenient operation, simple security
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[0052] Figure 1 shows a typical card used to store information, especially confidential information inf. In this embodiment, the card is a smart card CAR. For example, such a smart card CAR has the physical size of a typical credit card. The smart card CAR has a small keyboard KEP located on it. The keypad KEP is composed of an input element such as a key KEY for inputting numbers or characters for inputting a PIN code. The smart card CAR displays the PIN code PIN and possibly text information and digital results on its display DSP, for example, an LCD display. In addition, the smart card CAR also has a power source such as a battery (see Figure 2).
[0053] In addition, the smart card CAR has an interface device such as an electrical interface board INT, which provides electrical contact points between the card reader (not shown in FIG. 1) and the circuit of the smart card CAR.
[0054] When the smart card CAR is inserted into the slot of the card reader, the electrical interface...
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