| 摘要 |
A system for accepting entry of a password is described, the system comprising a display unit and a secure means for implementing a secure channel for the display unit such that the display unit is visible only to a user providing a user entry, the secure channel being removed upon deactivation of the secure means. The system further comprises a processing unit configured to generate a plurality of randomly arranged shadow-pad buttons interposed with a plurality of keypad buttons, each keypad button bearing a keypad character and shadow-pad button bearing a shadow-pad character, and each shadow-pad button being associated with a keypad button. The system further comprises a memory unit for storing the plurality of shadow-pad buttons interposed with the plurality of keypad buttons and an input unit for accepting the user entry upon the removal of the secure channel. Wherein the processing unit is further configured to display on the display unit the plurality of shadow-pad buttons interposed with the plurality of keypad buttons upon the implementation of the secure channel, each associated shadow-pad button having a visual effect to indicate its association with the corresponding keypad button. Wherein when a password character matches the keypad character of one of the keypad buttons, the shadow-pad character of the shadow-pad button associated with the matched keypad button indicates that the shadow-pad character should be selected as the user entry upon the removal of the secure channel; and wherein the processing unit is further configured to recognize that the password character has been entered when the shadow-pad character is entered as the user entry. |
