Contents sale system
First Claim
1. In a contents sale system including a host apparatus, a sale source terminal apparatus, a sale destination terminal apparatus, and copy destination apparatus, a method comprising the steps of:
- encrypting original contents data into encryption-resultant contents data in response to original playback key data by the host apparatus;
generating encryption key data on the basis of the original contents data by the host apparatus;
encrypting the original playback key data into first encryption-resultant playback key data using the encryption key data as encryption key by the host apparatus;
transmitting the encryption-resultant contents data and the first encryption-resultant playback key data to the sale source terminal apparatus by the host apparatus;
encrypting the first encryption-resultant playback key data into second encryption-resultant playback key data in response to an ID of the sale destination terminal apparatus by the sale source terminal apparatus;
transmitting the encryption-resultant contents data and the second encryption-resultant playback key data to the sale destination terminal apparatus by the sale source terminal apparatus;
enabling the sale destination terminal apparatus to decrypt the second encryption-resultant playback key data into the first encryption-resultant playback key data in response to the ID of the sale destination terminal apparatus;
enabling the sale destination terminal apparatus to decrypt the first encryption-resultant playback key data into the original playback key data;
enabling the sale destination terminal apparatus to decrypt the encryption-resultant contents data into the original contents data in response to the original playback key data;
encrypting the first encryption-resultant playback key data into third encryption-resultant playback key data in response to an ID of the copy destination terminal apparatus by the sale destination terminal apparatus; and
transmitting the encryption-resultant contents data and the third encryption-resultant playback key data to the copy destination terminal apparatus by the sale destination terminal apparatus.
4 Assignments
0 Petitions
Accused Products
Abstract
In a contents sale system, original contents data are encrypted into encryption-resultant contents data in response to original playback key data. The original playback key data are encrypted into first encryption-resultant playback key data. The first encryption-resultant playback key data are encrypted into second encryption-resultant playback key data in response to an ID of a sale destination terminal apparatus. The encryption-resultant contents data and the second encryption-resultant playback key data are transmitted to the sale destination terminal apparatus. The sale destination terminal apparatus is enabled to decrypt the second encryption-resultant playback key data into the first encryption-resultant playback key data in response to the ID of the sale destination terminal apparatus. The sale destination terminal apparatus is enabled to decrypt the first encryption-resultant playback key data into the original playback key data. The sale destination terminal apparatus is enabled to decrypt the encryption-resultant contents data into the original contents data in response to the original playback key data.
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Citations
10 Claims
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1. In a contents sale system including a host apparatus, a sale source terminal apparatus, a sale destination terminal apparatus, and copy destination apparatus, a method comprising the steps of:
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encrypting original contents data into encryption-resultant contents data in response to original playback key data by the host apparatus;
generating encryption key data on the basis of the original contents data by the host apparatus;
encrypting the original playback key data into first encryption-resultant playback key data using the encryption key data as encryption key by the host apparatus;
transmitting the encryption-resultant contents data and the first encryption-resultant playback key data to the sale source terminal apparatus by the host apparatus;
encrypting the first encryption-resultant playback key data into second encryption-resultant playback key data in response to an ID of the sale destination terminal apparatus by the sale source terminal apparatus;
transmitting the encryption-resultant contents data and the second encryption-resultant playback key data to the sale destination terminal apparatus by the sale source terminal apparatus;
enabling the sale destination terminal apparatus to decrypt the second encryption-resultant playback key data into the first encryption-resultant playback key data in response to the ID of the sale destination terminal apparatus;
enabling the sale destination terminal apparatus to decrypt the first encryption-resultant playback key data into the original playback key data;
enabling the sale destination terminal apparatus to decrypt the encryption-resultant contents data into the original contents data in response to the original playback key data;
encrypting the first encryption-resultant playback key data into third encryption-resultant playback key data in response to an ID of the copy destination terminal apparatus by the sale destination terminal apparatus; and
transmitting the encryption-resultant contents data and the third encryption-resultant playback key data to the copy destination terminal apparatus by the sale destination terminal apparatus. - View Dependent Claims (2, 3, 4)
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5. A contents sale system comprising a host apparatus, a sale source terminal apparatus, a sale destination terminal apparatus, and a copy destination apparatus;
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wherein the host apparatus comprises means for encrypting original contents data into encryption-resultant contents data in response to original playback key data, means for generating encryption key data on the basis of the original contents data, means for encrypting the original playback key data into first encryption-resultant playback key data in response to the encryption key data, and means for transmitting the encryption-resultant contents data and the first encryption-resultant playback key data to the sale source terminal apparatus;
wherein the sale source terminal apparatus comprises means for encrypting the first encryption-resultant playback key data into second encryption-resultant playback key data in response to an ID of a sale destination terminal apparatus, and means for transmitting the encryption-resultant contents data and the second encryption-resultant playback key data to the sale destination terminal apparatus;
wherein the sale destination terminal apparatus comprises means for decrypting the second encryption-resultant playback key data into the first encryption-resultant playback key data in response to the ID of the sale destination terminal apparatus, means for decrypting the first encryption-resultant playback key data into the original playback key data, and means for decrypting the encryption-resultant contents data into the original contents data in response to the original playback key data; and
wherein the sale destination terminal apparatus comprises means for encrypting the first encryption-resultant playback key data into third encryption-resultant playback key data in response to an ID of the copy destination terminal apparatus, and means for transmitting the encryption-resultant contents data and the third encryption-resultant playback key data to the copy destination terminal apparatus. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification