System, method and apparatus for distributing digital contents, information processing apparatus and digital content recording medium
First Claim
1. A digital content distributing system having a digital content distributing apparatus for distributing a digital content and an information processing apparatus for outputting a digital content distributed from the digital content distributing apparatus, wherein:
- said digital content distributing apparatus comprises;
a storage device storing a digital content;
an encryption processing device for performing an encryption process on a part of the digital content by using encryption key information shared with said information processing apparatus; and
a distributing device for distributing the partly encrypted digital content to said information processing apparatus, and said information processing apparatus comprises;
an input device for inputting a digital content distributed from said digital content distributing apparatus;
a decryption processing device for performing a decryption process on the encrypted part of the inputted digital content by using the encryption key information shared with said digital content distributing apparatus; and
an output device for outputting the digital content decrypted from the encrypted part, wherein said encryption processing device of said digital content distributing apparatus performs an encryption process, with a formatting unit of the digital content in plaintext taken as one unit, on a part of the units as a subject of encryption processing.
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Accused Products
Abstract
Distribution of a digital content is made possible in a form stimulating user'"'"'s visual and auditory desire while protecting the right of digital content A digital content distributing apparatus distributes to an information processing apparatus a digital content partly encrypted by using encryption key information shared with the information processing apparatus while the information processing apparatus performs a decryption process on an encrypted part of the digital content distributed from the digital content distributing apparatus by using the encryption key information. Herein, the digital content distributed from the digital content distributing apparatus is encrypted, in a part of the units as a subject of encryption with a formatting unit of the digital content in plaintext taken as one unit.
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Citations
21 Claims
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1. A digital content distributing system having a digital content distributing apparatus for distributing a digital content and an information processing apparatus for outputting a digital content distributed from the digital content distributing apparatus, wherein:
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said digital content distributing apparatus comprises;
a storage device storing a digital content;
an encryption processing device for performing an encryption process on a part of the digital content by using encryption key information shared with said information processing apparatus; and
a distributing device for distributing the partly encrypted digital content to said information processing apparatus, and said information processing apparatus comprises;
an input device for inputting a digital content distributed from said digital content distributing apparatus;
a decryption processing device for performing a decryption process on the encrypted part of the inputted digital content by using the encryption key information shared with said digital content distributing apparatus; and
an output device for outputting the digital content decrypted from the encrypted part, wherein said encryption processing device of said digital content distributing apparatus performs an encryption process, with a formatting unit of the digital content in plaintext taken as one unit, on a part of the units as a subject of encryption processing.
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2. A digital content distributing system having a digital content distributing apparatus for distributing a digital content and an information processing apparatus for outputting a digital content distributed from the digital content distributing apparatus, wherein:
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said digital content distributing apparatus comprises;
a storage device storing a digital content partly encrypted by using encryption key information shared with said information processing apparatus; and
a distributing device for distributing the stored digital content to said information processing apparatus, and said information processing apparatus comprises;
an input device for inputting a digital content distributed from said digital content distributing apparatus;
a decryption processing device for performing a decryption process on an encrypted part of the inputted digital content by using the encryption key information shared with said digital content distributing apparatus; and
an output device for outputting the digital content decrypted from the encrypted part, wherein the digital content stored by said storage device of said digital content distributing apparatus is encrypted, with a formatting unit of the digital content in plaintext taken as one unit, on a part of the units as a subject of encryption.
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3. A method for distributing a digital content from a digital content distributing apparatus to an information processing apparatus, in a digital content distributing system having the digital content distributing apparatus for distributing the digital content and the information processing apparatus for outputting the digital content distributed from the digital content distributing apparatus, said method comprising the steps of:
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distributing, by said digital content distributing apparatus a partly encrypted digital content which is encrypted by using encryption key information shared with said information processing apparatus, to said information processing apparatus; and
performing a decryption process using the encryption key information on an encrypted part of the digital content distributed from said digital content distributing apparatus by said information processing device;
wherein the digital content distributed by said digital content distributing apparatus is encrypted, with a formatting unit of the digital content in plaintext taken as one unit, on a part of the units as a subject of encryption. - View Dependent Claims (4, 5, 6, 7)
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8. A digital content distributing apparatus comprising:
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a storage device storing a digital content;
an encryption processing device for performing an encryption process on a part of the digital content by using encryption key information shared with an information processing apparatus which is to be a destination of distribution of the digital content; and
a distributing device for distributing the partly encrypted digital content to said information processing apparatus;
wherein said encryption processing device performs an encryption process, with a formatting unit of the digital content in plaintext taken as one unit, on a part of the units as a subject of encryption processing. - View Dependent Claims (10, 12, 14, 16)
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9. A digital content distributing apparatus comprising:
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a storage device storing a digital content partly encrypted by using encryption key information shared with an information processing apparatus which is to be a destination of distribution; and
a distributing device for distributing the stored digital content to said information processing apparatus;
wherein the digital content stored by said storage device is encrypted, with a formatting unit of the digital content in plaintext taken as one unit, on a part of the units as a subject of encryption. - View Dependent Claims (11, 13, 15, 17, 19, 20, 21)
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18. A recording medium having recorded therein a digital content, wherein the digital content is encrypted, with a formatting unit of the digital content in plaintext taken as one unit, on a part of the units as a subject of encryption.
Specification