Patent ID: 8737612

Claim:
A broadcast receiving device including a storage unit configured to store a device key, a tuner unit configured to receive a broadcast signal including a plurality of channels each including video content, an encryption key as a work key and a scramble key for descrambling the video content, and an output unit configured to generate and output a channel window displaying at least electronic program guide (EPG) information relating to programs in a group of channels among the plurality of channels in the broadcast signal, the device comprising: a determining unit configured to make a determination on a first channel selected and displayed on the channel window as to whether the encryption key corresponding to the selected first channel is available or unavailable; and a control unit configured to, in response to the determining unit determining that the encryption key corresponding to the selected first channel is unavailable, control the tuner unit to select each channel in the group of channels to be displayed in the channel window, control the determining unit to make the determination regarding availability of the encryption key on each channel in the group of channels, control the output unit to display the selected group of channels in the channel window, and control the output unit to generate and output the channel window so that each channel whose encryption key is determined as unavailable is identified among the group of channels displayed in the channel window; and an acquiring unit configured to acquire new encryption key and update the work key based on the new encryption key corresponding to each channel whose encryption key is determined as unavailable in the group of channels in a case where the new encryption key is available, wherein after the determination regarding availability of the encryption key on each channel in the group of channels displayed in the channel window, the control unit controls the tuner unit to select a second channel which is not displayed in the channel window, and controls the determining unit to make the determination regarding availability of the encryption key on the second channel.