Patent ID: 7752675

Claim:
A data receiving apparatus having a digital content copy protection (DCCP) function for determining an authentication of the data receiving device, the data receiving device comprising: a memory configured to store a unique key value; a digital interface device configured to transmit the unique key value to a data transmitting apparatus through a communication line, the data transmitting apparatus configured to compare a key value stored in the data transmitting apparatus with the unique key value, the digital interface device configured to receive, decode and output digital content from the data transmitting apparatus if the authentication has been successfully carried out; a data signal processor configured to process the digital content output from the digital interface device; a display configured to output the digital content processed by the data signal processor; and a controller configured to repeatedly determine whether or not the authentication has been performed within a predetermined time period, and to request a re-authentication of the data receiving apparatus via the stored unique key value if the controller determines that the authentication was not performed within the predetermined time period.