Content transmission device, content transmission method, and computer program used therewith

A transmission method for transmitting data, the transmission method comprising:

• receiving a user input at a user interface of at least one of a receiving device and a transmitting device;
• performing an authentication procedure between the transmitting device and the receiving device;
• setting first copy control information describing copy control information concerning the data;
• setting second copy control information including information different from the first copy control information;
• and
• generating and transmitting a packet to the receiving device, the packet including a header including the first copy control information and the second copy control information, and a payload obtained by encrypting the data with a predetermined key, wherein
• the transmitting method is operable under a transmission-system environment in which data transmission is performed by using a packet having a format including a header including a field in which the first copy control information is included and a field having a predetermined bit length for transmitting a nonce in which the second copy control information is embedded, and a payload including data in which content-embedded copy control information is embedded.

A receiving device for receiving data, the receiving device comprising:

• circuitry configured to perform an authentication procedure between the receiving device and a transmitting device;
• a communication interface configured to receive, from the transmitting device, a packet including a header including first copy control information and second copy control information, and a payload obtained by encrypting the data with a predetermined key, wherein the packet is transmitted in a form in which the second copy control information is embedded in a field having a predetermined bit length for transmitting a nonce;
• and
• circuitry configured to reproduce the data included in the payload transmitted from the transmission device.

A receiving method for receiving data, the data receiving method comprising:

• performing an authentication procedure between a receiving device and a transmitting device;
• receiving, at the receiving device from the transmitting device, a packet including a header including first copy control information and second copy control information, and a payload obtained by encrypting the data with a predetermined key, wherein the packet is transmitted in a form in which the second copy control information is embedded in a field having a predetermined bit length for transmitting a nonce;
• and
• reproducing, by the receiving device, the data included in the payload transmitted from the transmission device.

A non-transitory computer-readable medium including computer-program instructions, which when executed by a transmitting device, cause the transmitting device to:

• receive a user input at a user interface of the transmitting device;
• perform an authentication procedure between the transmitting device and a receiving device;
• set first copy control information describing copy control information concerning data;
• set second copy control information including information different from the first copy control information;
• and
• generate and transmit a packet to the receiving device, the packet including a header including the first copy control information and the second copy control information, and a payload obtained by encrypting the data with a predetermined key, wherein
• the transmitting device is operable under a transmission-system environment in which data transmission is performed by using a packet having a format including a header including a field in which the first copy control information is included and a field having a predetermined bit length for transmitting a nonce in which the second copy control information is embedded, and a payload including data in which content-embedded copy control information is embedded.

A non-transitory computer-readable medium including computer-program instructions, which when executed by a receiving device, cause the receiving device to:

• perform an authentication procedure between the receiving device and a transmitting device;
• receive, from the transmitting device, a packet including a header including first copy control information and second copy control information, and a payload obtained by encrypting the data with a predetermined key, wherein the packet is transmitted in a form in which the second copy control information is embedded in a field having a predetermined bit length for transmitting a nonce;
• and
• reproduce the data included in the payload transmitted from the transmission device.

An information processing system having a non-transitory computer-readable medium and an interface comprising:

• the non-transitory computer-readable medium including computer-program instructions, which when executed by a transmitting device, cause the transmitting device to:
• receive a user input at a user interface of the transmitting device;
• perform an authentication procedure between the transmitting device and a receiving device;
• set first copy control information describing copy control information concerning data;
• set second copy control information including information different from the first copy control information;
• and
• generate and transmit a packet to the receiving device, the packet including a header including the first copy control information and the second copy control information, and a payload obtained by encrypting the data with a predetermined key, wherein
• the transmitting device is operable under a transmission-system environment in which data transmission is performed by using a packet having a format including a header including a field in which the first copy control information is included and a field having a predetermined bit length for transmitting a nonce in which the second copy control information is embedded, and a payload including data in which content-embedded copy control information is embedded.

An information processing system having a non-transitory computer-readable medium and an interface comprising:

• the non-transitory computer-readable medium including computer-program instructions, which when executed by a receiving device, cause the receiving device to:
• perform an authentication procedure between the receiving device and a transmitting device;
• receive, from the transmitting device, a packet including a header including first copy control information and second copy control information, and a payload obtained by encrypting the data with a predetermined key, wherein the packet is transmitted in a form in which the second copy control information is embedded in a field having a predetermined bit length for transmitting a nonce;
• and
• reproduce the data included in the payload transmitted from the transmission device.