Original contents creation apparatus, derived contents creation apparatus, derived contents using apparatus, original contents creation method, derived contents creation method, and derived contents using method and verification method

• US 7,725,876 B2
• Filed: 06/06/2005
• Issued: 05/25/2010
• Est. Priority Date: 06/07/2004
• Status: Expired due to Fees

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Suzuki, Takashi, Takeshita, Atsushi, Fujimoto, Hiroshi
• Primary Examiner(s): Zhen; Wei Y
• Assistant Examiner(s): CHOW, CHIH CHING
• Application Number:
  US11/144,904
• Publication Number:
  US 20050273864A1
• Time in Patent Office: 1,814 Days
• Field of Search: 717/106, 705/27, 713/176, 715/716, 715/723
• US Class Current: 717/106
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]

Abstract

Disclosed is an original contents creation apparatus realizing a protection of original contents and derived contents in a derived contents distribution by any number of secondary providers. An original contents creation apparatus includes a limitation rule acquisition unit for acquiring a limitation rule of a case of inserting additional secondary contents into original contents, and a joining/signature unit for joining the limitation rule and a first operation rule to the original contents, the first operation rule defining an operation of a case of having detected an insertion of secondary contents violating the limitation rule, and giving an electronic signature to the original contents to which the limitation rule and the first operation rule are joined.

Claims

1. An original content creation apparatus configured to output original content, comprising:

a memory configured to store the original content, the original content including audio or video data, or information used to access the audio or video data;

a processing apparatus configured to communicatively interface with a derived content creation apparatus configured to generate derived content from the original content that is usable by a derived content replay apparatus;

a limitation rule acquisition unit configured to acquire, from the memory, a limitation rule that indicates an attribute of secondary content that is permitted to be inserted into the original content;

a joining unit configured to join the limitation rule and a first operation rule to the original content, the first operation rule defining an operation of the derived content creation apparatus or the derived content replay apparatus in response to a detection that an insertion of the secondary content violates the limitation rule;

a signature unit configured to give an electronic signature to the original content to which the limitation rule and the first operation rule are joined, wherein

the original content includes a placeholder designating an place for the secondary content to be inserted by the derived content creation apparatus; and

a receiving unit configured to receive a placeholder request including identification information of the placeholder from the derived content creation apparatus.

2. The original content creation apparatus according to claim 1, wherein

the receiving unit is further configured to receive a parameter from the derived content creation apparatus, the parameter being a verification key of the electronic signature and identification information of a verification algorithm, wherein the joining unit is configured to further join the parameter to the original content.

3. A derived content creation apparatus configured to insert secondary content into original content generated by an original content creation apparatus to thereby create derived content, comprising:

a memory configured to store the original content, the original content including audio or video data, or information used to access the audio or video data;

a processing apparatus configured to access the original content and to communicatively interface with the original content creation apparatus;

a limitation rule extraction unit configured to extract a limitation rule from the original content that indicates an attribute of the secondary content that is permitted to be inserted into the original content;

a secondary content insertion unit configured to generate the derived content by inserting the secondary content into the original content when the secondary content is determined to have the attribute of the limitation rule;

a derived content signature unit configured to provide an electronic signature to the derived content; and

a transmission unit configured to designate, to the original content, a placeholder for inserting the secondary content into the original content, and to transmit a placeholder request containing identification information of the placeholder to the original content creation apparatus,

wherein the secondary content insertion unit inserts the secondary content into the placeholder.

4. The derived content creation apparatus according to claim 3, wherein

the transmission unit is further configured to transmit, to the original content creation apparatus, a parameter being a verification key of the electronic signature and identification information of a verification algorithm, wherein the derived content signature unit gives the electronic signature by using an algorithm and a signature key which corresponds to the parameter.

5. A derived content replay apparatus configured to use derived content formed by inserting, at a derived content creation apparatus, secondary content into original content generated by an original content creation apparatus, the original content including audio or video data, or information used to access the audio or video data, comprising:

a memory configured to store the derived content;

a replay processing unit configured to replay the derived content;

a verification unit configured to perform a first verification using a first electronic signature generated by the original content creation apparatus, which is included in the derived content, to perform a fitness process using a limitation rule generated by the original content creation apparatus, which is included in the derived content, the limitation rule indicating an attribute of the secondary content that is permitted to be inserted into the original content, and to perform a second verification using a second electronic signature inserted into the derived content by the derived content creation apparatus; and

a derived content reproduction unit configured to decide processing of the derived content based on a result of the first verification result, a result of the second verification result, and a result of the fitness process;

wherein the derived content reproduction unit is further configured to interrupt the replay processing when either the first verification result or the second verification result is a failure;

process the derived content according to a first operation rule defining an operation in response to a detection that an insertion of the secondary content violates the limitation rule when the secondary content does not include the attribute of the limitation rule, the first operation rule being included in the original content; and

replay the derived content when the first verification result and the second verification result are successful and the secondary content includes the attribute of the limitation rule.