Portable terminal device, address book transfer device, information display method and address book transfer method used in portable terminal device, and computer program

An address book transfer device for transferring an address book stored in a first portable terminal device to a second portable terminal device, the address book transfer device comprising:

• an address book input portion that enters the address book from the first portable terminal device;
• a concealed address book generating portion that generates a concealed address book by concealing a part of characters indicated in the entered address book, said concealed address book includes a concealed character string concealing a first character or a second character among characters of names and telephone numbers or electronic mail addresses, said first character being a character other than a character frequently used and the second character being a character found as one of a predetermined character of the names and the telephone numbers or the electronic mail addresses and found as a predetermined character of any other names and telephone numbers or electronic mail addresses;
• and
• an address book output portion that delivers the generated concealed address book and an address book from which the concealed address book is generated to the second portable terminal device.

A method for displaying information in a portable terminal device, the method comprising:

• making an address book storing portion store an address book indicating names and telephone numbers or electronic mail addresses of other parties of communication;
• generating a character string in which a part or a whole of characters of the names and the telephone numbers or the electronic mail addresses of the other parties of communication is concealed, said concealed character string is generated by concealing a first character or a second character among characters of the names and the telephone numbers or the electronic mail addresses and said first character being a character other than a character frequently used and the second character being a character found as one of a predetermined character of the names and the telephone numbers or the electronic mail addresses and found as a predetermined character of any other names and telephone numbers or electronic mail addresses;
• and
• displaying, in a first display mode, a name and a telephone number or an electronic mail address of other party of communication designated by a user based on the address book without concealing characters of the name and the telephone number or the electronic mail address of the other party of communication designated by the user, and displaying, in a second display mode, the generated character string in which a part or a whole of characters of the name and the telephone number or the electronic mail address of the other party of communication designated by the user.

An address book transfer method for transferring an address book stored in a first portable terminal device to a second portable terminal device, the address book transfer method comprising:

• entering the address book from the first portable terminal device;
• generating a concealed address book by concealing a part of characters indicated in the entered address book, said concealed address book includes a concealed character string generated by concealing a first character or a second character among characters of a name and a telephone number or an electronic mail address and said first character being a character other than a character frequently used and the second character being a character found as one of a predetermined character of the names and the telephone numbers or the electronic mail addresses and found as a predetermined character of any other names and telephone numbers or electronic mail addresses;
• and
• delivering the generated concealed address book and an address book from which the concealed address book is generated to the second portable terminal device.

A tangible computer-readable medium having a computer program for use in a portable terminal device, the computer program making the portable terminal device perform the process comprising:

• making an address book storing portion store an address book indicating names and telephone numbers or electronic mail addresses of other parties of communication;
• generating a character string in which a part or a whole of characters of the names and the telephone numbers or the electronic mail addresses of the other parties of communication is concealed, said concealed character string is generated by concealing a first character or a second character among characters of the names and the telephone numbers or the electronic mail addresses and said first character being a character other than a character frequently used and the second character being a character found as one of a predetermined character of the names and the telephone numbers or the electronic mail addresses and found as a predetermined character of any other names and telephone numbers or electronic mail addresses;
• and
• displaying, in a first display mode, a name and a telephone number or an electronic mail address of other party of communication designated by a user based on the address book without concealing characters of the name and the telephone number or the electronic mail address of the other party of communication designated by the user, and displaying, in a second display mode, the generated character string in which a part or a whole of characters of the name and the telephone number or the electronic mail address of the other party of communication designated by the user.

A non-transitory computer-readable medium having a computer program for use in a computer transferring an address book stored in a first portable terminal device to a second portable terminal device, the computer program making the computer execute the process comprising:

• entering the address book from the first portable terminal device;
• generating a concealed address book by concealing a part of characters indicated in the entered address book, said concealed address book includes a concealed character string generated by concealing a first character or a second character among characters of a name and a telephone number or an electronic mail address and said first character being a character other than a character frequently used and the second character being a character found as one of a predetermined character of the names and the telephone numbers or the electronic mail addresses and found as a predetermined character of any other names and telephone numbers or electronic mail addresses;
• and
• delivering the generated concealed address book and an address book from which the concealed address book is generated to the second portable terminal device.