Region restrictive playback system
First Claim
1. A region restrictive playback system in which playback of content is restricted according to geographic region, comprising:
- a provision apparatus that encrypts content, based on first region information that indicates a region, to generate encrypted information, and provides the generated encrypted information; and
a playback apparatus that stores, in advance, second region information that indicates a region, obtains the encrypted information, attempts to decrypt the obtained encrypted information, based on the second region information, and, when the encrypted information is decrypted successfully, generates content as a result of decryption, and plays back the generated content.
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Accused Products
Abstract
DVD-Video discs and playback apparatuses are assigned a region code indicating one of six regions into which the world is divided, for the purpose of protecting copyrights of content such as movies and music. However, playback apparatuses exist that illegally circumvent the function of checking the region code of the disc with the region code of the playback apparatus.
The present invention provides a region restrictive viewing/listening system that enables regionally restricted viewing/listening, thereby preventing playback apparatuses which circumvent region code checking from playing back content correctly.
A content recording apparatus encrypts content, based on an internally-stored region code, and records the encrypted content to a recording medium. A content playback apparatus decrypts the content, based on an internally-stored region code, and plays back the content.
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Citations
56 Claims
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1. A region restrictive playback system in which playback of content is restricted according to geographic region, comprising:
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a provision apparatus that encrypts content, based on first region information that indicates a region, to generate encrypted information, and provides the generated encrypted information; and
a playback apparatus that stores, in advance, second region information that indicates a region, obtains the encrypted information, attempts to decrypt the obtained encrypted information, based on the second region information, and, when the encrypted information is decrypted successfully, generates content as a result of decryption, and plays back the generated content.
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2. A provision apparatus that provides content, playback of the content being restricted according to region, the provision apparatus comprising:
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a generation unit operable to encrypt content, based on region information that indicates a region, to generate encrypted information; and
a provision unit operable to provide the generated encrypted information. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A playback apparatus that restricts playback of content according to geographic region, comprising:
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a storage unit operable to store, in advance, second region information that indicates a region;
an obtaining unit operable to obtain encrypted information generated by encrypting content based on first region information that indicates a region;
a decryption unit operable to attempt to decrypt the obtained encrypted information, based on the second region information, and, when the encrypted information is decrypted successfully, generate content as a result of decryption; and
a playback unit operable to play back the generated content. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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- 48. A computer-readable recording medium that stores encrypted information that has been generated by encrypting content, based on region information indicating a geographical region.
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51. A provision method used in a provision apparatus for providing content whose playback is restricted according to geographical region, comprising:
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a generation of encrypting content, based on region information that indicates a region, to generate encrypted information; and
a provision step of providing the generated encrypted information.
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52. A provision program used in a provision apparatus for providing content, playback of the content being restricted according to geographical region, comprising:
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a generation of encrypting content, based on region information that indicates a region, to generate encrypted information; and
a provision step of providing the generated encrypted information. - View Dependent Claims (53)
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54. A playback method used in a playback apparatus that restricts playback of content according to geographical region, wherein the playback apparatus includes a storage unit operable to store, in advance, second region information that indicates a region, the playback method comprising:
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an obtaining step of obtaining encrypted information generated by encrypting content based on first region information that indicates a region;
a decryption step of attempting to decrypt the obtained encrypted information, based on the second region information, and, when the encrypted information is decrypted successfully, generate content as a result of decryption; and
a playback step of playing back the generated content.
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55. A playback program used in a playback apparatus-that restricts playback of content according to geographical region, wherein the playback apparatus includes a storage unit operable to store, in advance, second region information that indicates a region, the playback program comprising:
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an obtaining step of obtaining encrypted information generated by encrypting content based on first region information that indicates a region;
a decryption step of attempting to decrypt the obtained encrypted information, based on the second region information, and, when the encrypted information is decrypted successfully, generate content as a result of decryption; and
a playback step of playing back the generated content. - View Dependent Claims (56)
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Specification