| 摘要 |
judging whether a hiding function is set, when a key displaying the received message with the hiding function is inputted; ascertaining whether the received message stored in an internal memory exists, when the hiding function is not set; storing the password inputted by a user in the internal memory and giving the hiding function to the received message when the received message stored in the internal memory exists; judging whether the password inputted by the user is the same as the password stored in the internal memory when the hiding function is set; and cancelling the hiding function given to the received message stored in the internal memory and displaying the received message on the displaying part when the password inputted by the user is the same as the password stored in the internal memory.
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