Authority information verifying method, and display apparatus and authority information verifying system using the same

PURPOSE: An authority information checking method, a display device using the same, and an authority information checking system are provided to enable a user to easily check content manufactured by a CP having authority. CONSTITUTION: Authority information per a CP(Content Provider) is generated(S210). The generated authority information is encrypted. The encrypted authority information is included in a SDK(Software Development Kit)(S220). By using the received SDK, a widget is developed(S240). The developed widget is packed. At this time, authority information is transplanted to a widget(S250). The packed widget and authority information is released to a TV(S260).