JP2008028497A5

JP2008028497A5 -

Info

Publication number: JP2008028497A5
Application number: JP2006196411A
Authority: JP
Filing date: 2006-07-19
Publication date: 2009-01-08
Anticipated expiration: 2026-07-19

Claims

A content recording / playback apparatus including a recording medium for recording and playing back content,
A recording unit for digitally recording content on the recording medium;
A playback unit for playing back the content recorded on the recording medium;
An output unit for outputting the content to another device connected to the IP network;
A device authentication processing unit that authenticates that the devices are mutually authorized with the other devices connected to the network, and shares a key used for encryption and decryption of the content;
An encryption / decryption processing unit that encrypts the content at the time of transmission using a key shared in the authentication processing unit and decrypts the content at the time of reception;
Control that generates and manages a communication connection for exchanging control commands, various data, and content with other devices connected to the network, and performs transfer control of content recorded on the recording medium over the communication connection And comprising
The controller is
Wherein generating the first TCP socket for receiving control commands from other devices, it has been set in a state capable of receiving a request from the other device,
It said generating a second TCP socket for receiving a content transfer request from another device has been set to a state capable of receiving a request from the other device,
When a communication connection is established with the other device via the first TCP socket and the content viewing request is received from the first device, information on the second TCP socket is received. To the device,
When the communication connection is established with the other device via the second TCP socket and the viewing content transfer request is received from the other device, the encryption / decryption processing unit is necessary. And encrypts the content and sends it through the output unit,
When the content move request is received from the other device via the first TCP socket, the first and second TCP sockets are different from the first and second TCP sockets. Information on the third TCP socket and the fourth TCP socket for content transfer used only when the move is executed,
A request from the other device for the first TCP socket is set to a non-receivable state, and a content transfer request other than a content transfer currently being executed is not accepted;
Create the third TCP socket and the fourth TCP socket, and set the request to be received from the other device,
A communication connection is established with the other device that has issued the move request via the third TCP socket, and a request from the other device for the third TCP socket is set to a reception disabled state. , Perform device authentication processing with the device authentication processing unit, share a key used for encryption and decryption of the content to be moved,
A communication connection is established with the other device that has issued the move request via the fourth TCP socket, and a request from the other device for the fourth TCP socket is set to a reception disabled state. When the transfer request for the content to be moved is received from the other device, the content is encrypted by the encryption / decryption processing unit using the shared key and sent via the output unit,
A content recording / playback apparatus for performing a move.

When a timer is started when the third TCP socket is created, and a communication connection cannot be established between the third TCP socket and the other device that has issued the move request within a predetermined time. 2. The content recording / reproducing apparatus according to claim 1, wherein the third TCP socket is deleted.

A timer is started when the fourth TCP socket is created, and a communication connection cannot be established between the fourth TCP socket and the other device that has issued the move request within a predetermined time. The content recording / reproducing apparatus according to claim 1, wherein the fourth TCP socket is deleted.

At the end of the move, after discarding the third TCP socket and the fourth TCP socket, the second TCP socket is always reset to a state in which a request from the other device can be received. The content recording / reproducing apparatus according to claim 1.

  A content recording / playback method in a content recording / playback apparatus including a recording medium for recording and playing back content,
  A first TCP socket for receiving a control command from another device is generated and set to a state in which a request from the other device can be received;
  Generating a second TCP socket for receiving a content transfer request from the other device, and setting a state in which the request from the other device can be received;
  When a communication connection is established with the other device via the first TCP socket and the content viewing request is received from the first device, information on the second TCP socket is received. To the device,
  When establishing a communication connection with the other device via the second TCP socket and receiving the viewing content transfer request from the other device, the encryption / decryption processing unit may Encrypt the content and send it,
  When the content move request is received from the other device via the first TCP socket, the first and second TCP sockets are different from the first and second TCP sockets. Information on the third TCP socket and the fourth TCP socket for content transfer used only when the move is executed,
  A request from the other device for the first TCP socket is set to a non-receivable state, and a content transfer request other than a content transfer currently being executed is not accepted;
Create the third TCP socket and the fourth TCP socket, and set the request to be received from the other device,
  A communication connection is established with the other device that has issued the move request via the third TCP socket, and a request from the other device for the third TCP socket is set to a reception disabled state. , Perform device authentication processing, share the key used to encrypt and decrypt the content to be moved,
  A communication connection is established with the other device that has issued the move request via the fourth TCP socket, and a request from the other device for the fourth TCP socket is set to a reception disabled state. When the transfer request for the content to be moved is received from the other device, the content is encrypted by the encryption / decryption processing unit using the shared key and sent via the output unit,
  A content recording / reproducing method characterized by executing a move.

When a timer is started when the third TCP socket is created, and a communication connection cannot be established between the third TCP socket and the other device that has issued the move request within a predetermined time. 6. The content recording / reproducing method according to claim 5, wherein the third TCP socket is deleted.

A timer is started when the fourth TCP socket is created, and a communication connection cannot be established between the fourth TCP socket and the other device that has issued the move request within a predetermined time. 7. The content recording / reproducing method according to claim 5, wherein the fourth TCP socket is deleted.

At the end of the move, after discarding the third TCP socket and the fourth TCP socket, the second TCP socket is always reset to a state in which a request from the other device can be received. The content recording / reproducing method according to claim 5, wherein: