Abstract: The present invention relates to an information processing apparatus by which a communication channel providing a high degree of privacy is established between a PDA and a data communication server. In the information processing apparatus, first, the PDA and a memory card are connected to each other, and perform mutual authentication. Data encrypted with a temporary key shared by the PDA and the memory card as a result of the authentication is transferred from the PDA to the memory card, decrypted by the shared temporary key, and then stored in the memory card. Next, a PC and the memory card are connected to each other, and perform mutual authentication. The data encrypted with a temporary key shared by the PC and the memory card as a result of the authentication is transferred from the memory card to the PC, decrypted by the shared temporary key, and then stored in the PC. Then, the PC and the data communication server are connected to each other, and perform mutual authentication.

Abstract: Contents and its key are supplied in different procedures. License management program authenticates telephone-integrated terminal device and authenticates first server or second server. Server LCM controls the reception of contents and key transmission requests and of data for identifying first server or second server. If data for identifying first server are received, contents and its key are received from first server in a procedure corresponding to first server. If data for identifying second server are received, contents and its key are received from second server in a procedure corresponding to second server. Server LCM controls the transmission of contents and its key to telephone-integrated terminal device.

Abstract: Disclosed is an information-presenting apparatus includes a first holding means for holding a first information transmission destination and a second information transmission destination; a second holding means for holding a criterion for selecting either the first information transmission destination or the second information transmission destination; a selection means for selecting either the first information transmission destination or the second information transmission destination on the basis of the criterion held in the second holding means; and a transmission control means for controlling transmission of information to either the first information transmission destination or the second information transmission destination selected by the selection means.

Abstract: The present invention is intended to quickly download contents while preventing unauthorized contents usage. PD authentication program authenticates telephone-integrated terminal device. Server authentication program authenticate key server. Server LCM controls the reception of a request for data for identifying key server and a key from telephone-integrated terminal device. On the basis of the data for identifying key server, server LCM sends a request for the key to key server and receives the requested key from key server. Key distribution program sends the key to telephone-integrated terminal device.