Content output apparatus, content output method and content aquisition apparatus

• US 20060117191A1
• Filed: 11/29/2005
• Published: 06/01/2006
• Est. Priority Date: 11/30/2004
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Fukushima, Michihiro
• Granted Patent: US 7,752,462 B2
• Time in Patent Office: Days
• US Class Current: 713/193
• CPC Class Codes: H04N 21/4135 external recorder interface circuits between an apparatus for recording television signals and a television receiver H04N5/775
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4367 Establishing a secure communication between the client and a peripheral device or smart card
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58

Abstract

A content output apparatus of the invention comprises an encryption processing unit configured to apply an encryption processing to the content, a recording unit configured to record the content to which the encryption processing has been applied and identification information which identifies the content itself on the network in the storage device on the network so as to be related with each other, and an output unit configured to read a requested content from the storage device on the basis of a content acquisition request supplied via the network, decrypt the encryption, further apply a predetermined processing to the content, and transmit it on the network.

Claims

1. A content output apparatus for outputting a content to a storage device via a network and recording it therein, comprising:

an encryption processing unit configured to apply an encryption processing to the content;

a recording unit configured to record the content to which the encryption processing has been applied by the encryption processing unit and identification information which identifies the content itself on the network in the storage device so as to be related with each other; and

an output unit configured to read a requested content from the storage device on the basis of a content acquisition request supplied via the network, decrypt the encryption, further apply a predetermined processing to the content, and transmit it on the network.

2. A content output apparatus according to claim 1, wherein the output unit comprises an authentication processing unit configured to authenticate a device on the network which has generated a content acquisition request supplied via the network on the basis of the request, and

the output unit is configured to, when it is determined that it is possible to receive the content acquisition request by the authentication processing unit, read the requested content from the storage device, decrypts the encryption, further apply a predetermined processing to the content, and transmit it on the network.

3. A content output apparatus according to claim 1, wherein the output unit is configured to apply an encryption processing that is established with respect to the device which has generated the content acquisition request to the content which is read from the storage device and of which encryption is decrypted, on the basis of the content acquisition request, and transmit the content on the network.

4. A content output apparatus according to claim 1, wherein the recording unit is configured to add the identification information which identifies the content itself on the network to the content to which the encryption processing has been applied by the encryption processing unit, and cause the storage device to record it therein.

5. A content output apparatus according to claim 1, wherein the recording unit is configured to record on the storage device a management table which relates a name of the content to which the encryption processing has been applied by the encryption processing unit to the identification information which identifies the content itself on the network.

6. A content output method for outputting a content to a storage device via a network and recording it therein, comprising:

a first step of applying an encryption processing to the content;

a second step of recording in the storage device the content to which the encryption processing has been applied in the first step and identification information which identifies the content itself on the network so as to be related with each other; and

a third step of reading a requested content from the storage device on the basis of a content acquisition request supplied via the network, decrypting that encryption, further applying a predetermined processing to the content, and transmitting it on the network.

7. A content output method according to claim 6, wherein the third step has an authentication step of authenticating a device on the network which has generated a content acquisition request supplied via the network on the basis of the request

when it is determined that it is possible to receive the content acquisition request as a result of the authentication of the authentication step, reading the requested content from the storage device, decrypting the encryption, further applying a predetermined processing to the content, and transmitting it on the network.

8. A content output method according to claim 6, wherein the third step applies an encryption processing that is established with respect to the device which has generated the content acquisition request to the content which is read from the storage device and of which encryption is decrypted, on the basis of the content acquisition request and transmits the content on the network.

9. A content acquisition apparatus for acquiring a predetermined content via a network from a storage device having recorded therein an encrypted content and identification information of a device configured to decrypt a code of the content so as to be related with each other, comprising:

a selecting unit configured to select a predetermined content from the content recorded in the storage device;

a requesting unit configured to request decryption of the code of the content selected by the selecting unit and acquisition the content from the device which is indicated by identification information corresponding to the content; and

an acquisition unit configured to acquire the content transmitted from the device on the network on the basis of the request of the requesting unit.

10. A content acquisition apparatus according to claim 9, wherein the device which is indicated by the identification information corresponding to the content selected by the selecting unit applies an encryption processing to the requested content and transmits it on the network,

the acquisition unit is configured to acquire the content transmitted from the device on the network and decrypt the encryption.