Patent ID: 7340055

Claim:
A data recording apparatus ( 110 ) to receive and record reproduction information associated with reproduction of encrypted content data, including a content key to decrypt said encrypted content data into plaintext, through a communication path, said data recording apparatus comprising: a data communication unit to establish a communication path with a transmission source of said reproduction information to receive said reproduction information transmitted in an encrypted state, a first storage unit ( 1415 , 1440 ) to store data associated with said reproduction information applied from said data communication unit, an information extraction unit performing a process of storing data associated with said reproduction information from said data communication unit into said first storage unit, and extracting said reproduction information based on data stored in said first storage unit, a second storage unit ( 1460 ) receiving said reproduction information to record reception log information indicating a processing status of a reception process to record in said first storage unit, and a control unit ( 1420 ) to control operation of said data recording apparatus, wherein said control unit transmits through said data communication unit said reception log information recorded in said second storage unit according to a request.