Contents processing system
First Claim
1. A contents signal receiving device comprising:
- receiving means for receiving a contents signal from a first device, the contents signal being encrypted by a first key, and for receiving the first key from the first device, the first key being encrypted by a second key;
storage means for storing the encrypted contents signal received by the receiving means;
decoding means for decoding the encrypted contents signal stored in the storage means when an instruction to decode the encrypted contents signal stored in the storage means is given as user-designated information;
identification information appending means for appending identification information to the contents signal decoded by the decoding means;
transmission means for transmitting the first key encrypted by the second key to a second device that decrypts the first key; and
decrypting means;
wherein the receiving means receives the first key from the second device, the second device having encrypted the first key with a third key, andwherein the decrypting means decrypts the first key encrypted with the third key.
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Accused Products
Abstract
A first information processing unit stores identification information into a storage module, stores an encrypted contents signal into a mass storage unit, and supplies the encrypted contents signal and identification information to a second information processing unit through a communication section. In a receiving unit of the first information processing unit, log information generated by a purchase processing module is stored into the storage module every time the contents key is decoded, and the log information is transmitted at predetermined timing to a key management center through the transmission section. The second information processing unit receives the encrypted contents signal and the identification information through a communication section, and causes a contents processing section to decode the encrypted contents signal and to append the identification information thereto.
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Citations
10 Claims
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1. A contents signal receiving device comprising:
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receiving means for receiving a contents signal from a first device, the contents signal being encrypted by a first key, and for receiving the first key from the first device, the first key being encrypted by a second key; storage means for storing the encrypted contents signal received by the receiving means; decoding means for decoding the encrypted contents signal stored in the storage means when an instruction to decode the encrypted contents signal stored in the storage means is given as user-designated information; identification information appending means for appending identification information to the contents signal decoded by the decoding means; transmission means for transmitting the first key encrypted by the second key to a second device that decrypts the first key; and decrypting means; wherein the receiving means receives the first key from the second device, the second device having encrypted the first key with a third key, and wherein the decrypting means decrypts the first key encrypted with the third key. - View Dependent Claims (2, 3, 4, 5)
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6. A contents signal receiving method by a third device, the method comprising the steps of:
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receiving a contents signal from a first device, the contents signal being encrypted by a first key; receiving the first key from the first device, the first key being encrypted by a second key; storing the received encrypted contents signal; decoding the stored encrypted contents signal when an instruction to decode the stored encrypted contents signal is given as user-designated information; appending identification information to the decoded contents signal; transmitting the first key encrypted by the second key to a second device that decrypts the first key; receiving the first key from the second device, the second device having encrypted the first key with a third key; and decrypting the first key encrypted with the third key, the decrypting being done by the third device. - View Dependent Claims (7, 8, 9, 10)
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Specification