| 摘要 |
PURPOSE: A password input device is provided to determine damage caused by hacking of a conductive pattern of a pattern forming unit, thereby determining a state of the password input device. CONSTITUTION: A pattern forming unit (300) includes a password input unit (200), which includes input buttons, and a conductive pattern unit which is located on a lower part of the password input unit. The conductive pattern unit comprises a first hacking prevention terminal, a second hacking prevention terminal, and a conductive pattern which is connected to the first and second hacking prevention terminal. First and second hacking prevention buttons (351,352) touch the first and second hacking prevention terminal. A contact unit (500) is located on a lower part of the pattern forming unit. The contact unit comprises switch terminal units, a first hacking prevention contact, and a second hacking prevention contact. The switch terminal units are located in a part corresponding to the input buttons. The first hacking prevention contact and the second hacking prevention contact touch the first hacking prevention button and the second hacking prevention button.
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