Abstract: A user authentication method for a remote control apparatus and a remote control apparatus using this method are provided. If a user inputs information for user authentication after having inputted a command for control of a controlled device, this information is compared with the corresponding user authentication information stored. If the user authentication is successful, it is determined whether a secondary authentication is required. If a secondary authentication is required, authentication data, as well as control data corresponding to the user's command, are transmitted to the controlled device. The controlled device operates in accordance with the received control data, if the authentication with the received authentication data was successful. The method and apparatus allow individual setting of a communication device for each controlled device.

Abstract: Disclosed is a broadcasting program reservation-recording system using a PDA comprising: a CDMA module provided with a mobile communication module for receiving broadcasting program information; a remote communication controller for exchanging data with an external device or performing a wireless communication in order to control the external device; a storage unit for storing broadcasting program information received through the CDMA module and control data for each kind of external device received by the remote communication controller; a controller for converting the broadcasting program information stored in the storage unit into data information of a suitable form to be displayed and thereby outputting; and a display unit for displaying data information regarding the broadcasting program information outputted from the controller on a screen.

Abstract: The invention provides a user authentication method that allows selection of a level of user authentication for a remote control apparatus in accordance with an importance of the device to be controlled, and a remote control apparatus using this method. If a user inputs information for user authentication after having inputted a command for control of a controlled device, this information is compared with the corresponding user authentication information stored. If the user authentication is successful, it is determined whether a secondary authentication is required. If a secondary authentication is required, authentication data, as well as control data corresponding to the user's command, are transmitted to the controlled device. The controlled device operates in accordance with the received control data, if the authentication with the received authentication data was successful. The invention allows individual setting of a communication device for each controlled device.