Abstract: According to one embodiment, a transmitting method transmits a start request for an authentication and key exchange from at least one of receivers to the transmitter, performs an authentication and key exchange for at least one of a first key common to the receivers and a second key peculiar to the at least one of the receivers, and encrypts the content by using a key shared by the transmitter and the at least one of the receivers to transmit the encrypted content to the at least one of the receivers.

Abstract: According to one embodiment, a content playback apparatus which acquires desired content from a specific site accessed via a network and plays back the acquired content, comprises a determination module configured to determine, when a data input request is received from a currently accessed site, whether or not the site is at least a site included in the specific site, and a controller configured to generate, when the determination module determines that the currently accessed site is not included in the specific site, a warning that advises accordingly.

Abstract: According to one embodiment, a transmitting method transmits a start request for an authentication and key exchange from at least one of receivers to the transmitter, performs an authentication and key exchange for at least one of a first key common to the receivers and a second key peculiar to the at least one of the receivers, and encrypts the content by using a key shared by the transmitter and the at least one of the receivers to transmit the encrypted content to the at least one of the receivers.

Abstract: According to an aspect of the present invention, there is provided a receiver configured to perform browsing of information relating to a broadcast program to be received and/or recorded by accessing to an Internet server being independent of the broadcast program, the receiver including: a browsing module configured to perform the browsing; a recording module configured to start, upon a start of the browsing, recording of the broadcast program being broadcasted and viewed; and a replying module configured to return, upon receiving of an acquisition request from the Internet server, identifying information relating to the broadcast program that has been viewed so far or being viewed to the server.

Abstract: According to one embodiment, a content playback apparatus which acquires desired content from a specific site accessed via a network and plays back the acquired content, comprises a determination module configured to determine, when a data input request is received from a currently accessed site, whether or not the site is at least a site included in the specific site, and a controller configured to generate, when the determination module determines that the currently accessed site is not included in the specific site, a warning that advises accordingly.

Abstract: A data transmission apparatus includes: a key exchange unit that exchanges an encryption key for encrypting and decrypting the data with an another apparatus; a first control unit that transmits information concerning the data transmission apparatus required in performing the key exchange by the another apparatus; a second control unit that transmits a first packet containing encrypted data and being set that the data size of the encrypted data is zero, to the another apparatus after the transmission of the information by the first control unit and until completion of the key exchange performed by the key exchange unit; and a third control unit that starts to transmit a second packet containing encrypted data provided by encrypting the data to be transmitted, to the another apparatus after completion of the key exchange performed by the key exchange unit.

Abstract: According to one embodiment, a broadcast receiving apparatus is equipped with a server function so as to cause a client terminal to recognize the broadcast receiving apparatus as a server on a network and to select a channel for the broadcast receiving apparatus by way of a user operation. The broadcast receiving apparatus incorporate the image of the channel selected by the client terminal in the GUI image generated by the client terminal without transmitting the actual image of the channel on the network.

Abstract: According to one embodiment, a broadcast receiving apparatus is equipped with a server function so as to cause a client terminal to recognize the broadcast receiving apparatus as a server on a network and to select a channel for the broadcast receiving apparatus by way of a user operation. The broadcast receiving apparatus incorporate the image of the channel selected by the client terminal in the GUI image generated by the client terminal without transmitting the actual image of the channel on the network.

Abstract: According to one embodiment, a network connection apparatus includes a network connection unit connected to a network and configured to detect a change in a network, a registering unit configured to store identification data obtained from a partner apparatus via the network, and to register the partner apparatus, a collecting unit configured to collect the identification data of the partner apparatus via the change-detected network based on change detection of the network, and a service providing unit configured to compare identification data of a registered partner apparatus and the collected identification data, to determine whether the partner apparatus connected via the change-detected network is registered or unregistered, and to differentially provide a service to the registered partner apparatus and a service to the unregistered partner apparatus.

Abstract: According to one embodiment, a transmitting method transmits a start request for an authentication and key exchange from at least one of receivers to the transmitter, performs an authentication and key exchange for at least one of a first key common to the receivers and a second key peculiar to the at least one of the receivers, and encrypts the content by using a key shared by the transmitter and the at least one of the receivers to transmit the encrypted content to the at least one of the receivers.

Abstract: A data transmission apparatus includes: a key exchange unit that exchanges an encryption key for encrypting and decrypting the data with an another apparatus; a first control unit that transmits information concerning the data transmission apparatus required in performing the key exchange by the another apparatus; a second control unit that transmits a first packet containing encrypted data and being set that the data size of the encrypted data is zero, to the another apparatus after the transmission of the information by the first control unit and until completion of the key exchange performed by the key exchange unit; and a third control unit that starts to transmit a second packet containing encrypted data provided by encrypting the data to be transmitted, to the another apparatus after completion of the key exchange performed by the key exchange unit.

Abstract: A household terminal device updating method comprises a first transmission step for, in updating copy protection canceling CERT information provided from a networked external server, transmitting an authentication command added with CERT information already stored, a first reception step for receiving updated signature information encrypted using a first shared key from the server, a second transmission step for transmitting an authentication command added with the updated signature information, a second reception step for receiving information of updating completion encrypted with a second shared key from the server, a decision step for decrypting the information using the second shared key and then making a decision of whether or not updating has resulted in success depending on whether or not the information of updating completion has been decrypted successfully, and an update step for duly updating the CERT information when the decision is that updating has resulted in success.

Abstract: A device on the sending and playing device plays and outputs a content recorded to a recording medium on the sending side. A device on the receiving and recording side receives the played and outputted content and records it to a recording medium on the receiving side. The device on the sending and playing device erases the content recorded to the device on the sending and playing device based on recording-state information of the device on the receiving and recording side by using the sent played content. Thus, in move processing of a “Copy Once” content, it is possible to prevent the loss of content by the device on the sending and playing side when the device on the receiving and recording and side does not normally record the content.

Abstract: A network communication apparatus which transmits data to and receives it from an other device according to a network communication protocol has been disclosed. The network communication apparatus includes an authentication managing unit which switches exclusively between a transmission-side authentication process and a reception-side authentication process according to a data transmission/reception request, thereby limiting the operating time of each of the processes variably.

Abstract: A wireless communication apparatus and a wireless network. A first wireless communication apparatus transmits a connection request to a second wireless communication apparatus. The first wireless communication apparatus transmits key information (Key K) to the second wireless communication apparatus through an electric power line or another cable. The first wireless communication apparatus also transmits a check signal to the second wireless communication apparatus. The second wireless communication apparatus answers the check signal. The first wireless communication apparatus acknowledges the connection request to the second wireless communication apparatus, and thereby data communication is performed.