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 20050273864A1
• Filed: 06/06/2005
• Published: 12/08/2005
• Est. Priority Date: 06/07/2004
• Status: Active Grant

• 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
• Granted Patent: US 7,725,876 B2
• Time in Patent Office: Days
• US Class Current: 726/27
• 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 contents creation apparatus for creating original contents, comprising:

a limitation rule acquisition unit configured to acquire a limitation rule of a case of inserting additional secondary contents into the original contents;

a joining unit configured to join 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

a signature unit configured to give an electronic signature to the original contents to which the limitation rule and the first operation rule are joined.

2. The original contents creation apparatus according to claim 1, further comprising:

a first receiving unit configured to receive a parameter from an apparatus for inserting the secondary contents into the original contents, the parameter being necessary for correctness verification of derived contents into which the secondary contents are inserted,

wherein the joining unit further joins the parameter to the original contents.

3. The original contents creation apparatus according to claim 1,

wherein the original contents contain a placeholder for designating an insertion place of the secondary contents, and

the original contents creation apparatus further comprises:

a second receiving unit configured to receive a placeholder request containing identification information of the placeholder from the apparatus for inserting the secondary contents into the original contents.

4. A derived contents creation apparatus for inserting additional secondary contents into original contents, thereby creating derived contents, comprising:

a limitation rule extraction unit configured to extract a limitation rule of a case of inserting the secondary contents, the limitation rule being contained in the original contents;

a secondary contents insertion unit configured to insert the secondary contents into the original contents when the secondary contents fit to the limitation rule; and

a derived contents signature unit configured to give an electronic signature to the derived contents.

5. The derived contents creation apparatus according to claim 4, further comprising:

a first transmission unit configured to transmit, to an apparatus for creating the original contents, a parameter necessary for correctness verification of the derived contents into which the secondary contents are inserted,

wherein the derived contents signature unit gives the electronic signature by using an algorithm and a signature key which correspond to the parameter.

6. The derived contents creation apparatus according to claim 4, further comprising:

a second transmission unit configured to designate, to the original contents, a placeholder for inserting the secondary contents thereinto, and transmit a placeholder request containing identification information of the placeholder to the apparatus for creating the original contents,

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

7. A derived contents using apparatus for using derived contents formed by inserting additional secondary contents into original contents, comprising:

a derived contents using unit configured to decide processing of the derived contents based on a first verification result of an electronic signature by an apparatus that has created the original contents, a second verification result of an electronic signature by an apparatus that has inserted the secondary contents, and a fitness result of the secondary contents to a limitation rule of a case of inserting the secondary contents, the limitation rule being contained in the original contents.

8. The derived contents using apparatus according to claim 7,

wherein the derived contents using unit:

interrupts replay processing of the derived contents when either the first verification result or the second verification result is a failure;

processes the derived contents according to a first operation rule defining an operation of a case of having detected an insertion of secondary contents violating the limitation rule when the secondary contents do not fit to the limitation rule, the first operation rule being described in the original contents; and

replays the derived contents when the first verification result and the second verification result are successes and the secondary contents fit to the limitation rule.

9. An original contents creation method for creating original contents, comprising:

acquiring a limitation rule of a case of inserting additional secondary contents into the original contents;

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.

10. A derived contents creation method for inserting additional secondary contents into original contents, thereby creating derived contents, comprising:

extracting a limitation rule of a case of inserting the secondary contents, the limitation rule being contained in the original contents;

inserting the secondary contents into the original contents when the secondary contents fit to the limitation rule; and

giving an electronic signature to the derived contents.

11. A derived contents using method for using derived contents formed by inserting additional secondary contents into original contents, comprising:

deciding processing of the derived contents based on a first verification result of an electronic signature by an apparatus that has created the original contents, a second verification result of an electronic signature by an apparatus that has inserted the secondary contents, and a fitness result of the secondary contents to a limitation rule of a case of inserting the secondary contents, the limitation rule being contained in the original contents.

12. A verification method for verifying derived contents formed by inserting additional secondary contents into original contents, comprising:

acquiring a limitation rule of a case of inserting the additional secondary contents into the original contents;

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;

giving a first electronic signature to the original contents to which the limitation rule and the first operation rule are joined;

extracting the limitation rule contained in the original contents;

inserting the secondary contents into the original contents when the secondary contents fit to the limitation rule;

giving a second electronic signature to the derived contents; and

deciding processing of the derived contents based on a verification result of the first electronic signature, a verification result of the second electronic signature, and a fitness result of the secondary contents to the limitation rule.