Content reproduction apparatus
First Claim
1. A content reproduction apparatus which reproduces a digital content, the content reproduction apparatus comprising:
- a secret information storage unit including a memory operable to store a device key, the device key corresponding to the content reproduction apparatus, and the device key being stored in the secret information storage unit such that the device key cannot be accessed from outside of the content reproduction apparatus;
a cryptographic processing unit operable to decrypt an encrypted digital content corresponding to the digital content, the encrypted digital content being encrypted using the device key stored in the secret information storage unit;
an index information storage unit operable to store index information, the index information indicating the device key stored in the secret information storage unit, and the index information being stored in the index information storage unit such that the index information is accessed from outside of the content reproduction apparatus;
a video output unit operable to connect to a display apparatus that is distinct from the content reproduction apparatus;
a user identification information transmission unit operable to transmit user identification information to a user authentication server located outside of the content reproduction apparatus, the user authentication server performing user authentication based on the user identification information received from the user identification information transmission unit, and the user authentication server transmitting an instruction for outputting the index information from the index information storage unit, based on a result of the authentication performed by the user authentication server;
an instruction receiving unit operable to receive, from the user authentication server, the instruction for outputting the index information from the index information storage unit;
a video processing unit operable to convert the index information stored in the index information storage unit into a data format that is displayable on a screen of the display apparatus; and
an index information output unit operable to output, via the video output unit, only the index information converted by the video processing unit to cause the display apparatus to display the index information converted by the video processing unit, the index information converted by the video processing unit being output to the display apparatus based on the instruction received by the instruction receiving unit.
2 Assignments
0 Petitions
Accused Products
Abstract
A content reproduction apparatus (1) which reproduces digital contents, and includes a device key storage unit (110) holding a device key (110a) specific to the content reproduction apparatus (1) in a manner that does not allow access from outside the content reproduction apparatus (1). The content reproduction apparatus (1), also includes a device ID storage unit (19) holding device key index information (19a) that is in a one-to-one association with a device key (110a), an instruction code receiving unit (14a) receiving an instruction code to output index information, a device key index information obtainment processing unit (10a) outputting, to outside, the device key index information (19a) stored in the device ID storage unit (19) based on the instruction, and a device key index information output processing unit (11a).
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Citations
12 Claims
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1. A content reproduction apparatus which reproduces a digital content, the content reproduction apparatus comprising:
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a secret information storage unit including a memory operable to store a device key, the device key corresponding to the content reproduction apparatus, and the device key being stored in the secret information storage unit such that the device key cannot be accessed from outside of the content reproduction apparatus; a cryptographic processing unit operable to decrypt an encrypted digital content corresponding to the digital content, the encrypted digital content being encrypted using the device key stored in the secret information storage unit; an index information storage unit operable to store index information, the index information indicating the device key stored in the secret information storage unit, and the index information being stored in the index information storage unit such that the index information is accessed from outside of the content reproduction apparatus; a video output unit operable to connect to a display apparatus that is distinct from the content reproduction apparatus; a user identification information transmission unit operable to transmit user identification information to a user authentication server located outside of the content reproduction apparatus, the user authentication server performing user authentication based on the user identification information received from the user identification information transmission unit, and the user authentication server transmitting an instruction for outputting the index information from the index information storage unit, based on a result of the authentication performed by the user authentication server; an instruction receiving unit operable to receive, from the user authentication server, the instruction for outputting the index information from the index information storage unit; a video processing unit operable to convert the index information stored in the index information storage unit into a data format that is displayable on a screen of the display apparatus; and an index information output unit operable to output, via the video output unit, only the index information converted by the video processing unit to cause the display apparatus to display the index information converted by the video processing unit, the index information converted by the video processing unit being output to the display apparatus based on the instruction received by the instruction receiving unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A content reproduction system which reproduces a digital content, the content reproduction system comprising:
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a content reproduction apparatus which reproduces the digital content; and a user authentication server which performs user authentication, wherein the content reproduction apparatus includes; a secret information storage unit including a memory operable to store a device key, the device key corresponding to the content reproduction apparatus, and the device key being stored in the secret information storage unit such that the device key cannot be accessed from outside of the content reproduction apparatus; a cryptographic processing unit operable to decrypt an encrypted digital content corresponding to the digital content, the encrypted digital content being encrypted using the device key stored in the secret information storage unit; an index information storage unit operable to store index information, the index information indicating the device key stored in the secret information storage unit, and the index information being stored in the index information storage unit such that the index information is accessed from outside of the content reproduction apparatus; a video output unit operable to connect to a display apparatus that is distinct from the content reproduction apparatus; a user identification information transmission unit operable to transmit user identification information to the user authentication server; an instruction receiving unit operable to receive, from the user authentication server, an instruction for outputting the index information from the index information storage unit; a video processing unit operable to convert the index information stored in the index information storage unit into a data format that is displayable on a screen of the display apparatus; and an index information output unit operable to output, via the video output unit, only the index information converted by the video processing unit, the index information converted by the video processing unit being output to the display apparatus based on the instruction received by the instruction receiving unit, and wherein the user authentication server includes; a user authentication unit operable to perform user authentication based on the user identification information received from the content reproduction apparatus; and an instruction transmission unit operable to transmit the instruction to the content reproduction apparatus, based on a result of the authentication performed by the user authentication unit.
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11. A method for controlling a content reproduction apparatus, the content reproduction apparatus storing a device key that corresponds to the content reproduction apparatus, the device key being stored in the content reproduction apparatus such that the device key cannot be accessed from outside of the content reproduction apparatus, the content reproduction apparatus decrypting an encrypted digital content using the stored device key to reproduce a digital content, the content reproduction apparatus storing index information that indicates the stored device key, and the index information being stored in the content reproduction apparatus such that the index information is accessed from outside of the content reproduction apparatus, and the content reproduction apparatus being connected to a display apparatus that is distinct from the content reproduction apparatus, the method comprising:
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transmitting user identification information to a user authentication server located outside of the content reproduction apparatus, the user authentication server performing user authentication based on the user identification information received from the transmitting of the user identification information, and the user authentication server performing transmitting of an instruction for outputting the index information stored by an index information storage unit of the content reproduction apparatus, based on a result of the authentication performed by the user authentication server; receiving, from the user authentication server, the instruction for outputting the index information from the index information storage unit of the content reproduction apparatus; converting the stored index information into a data format that is displayable on a screen of the display apparatus, the stored index information being converted based on the received instruction; and outputting only the converted index information to the display apparatus to cause the display apparatus to display the index information converted by the video processing unit.
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12. A non-transitory computer-readable recording medium having a program recorded thereon, the program being used in a content reproduction apparatus, the content reproduction apparatus storing a device key that corresponds to the content reproduction apparatus, the device key being stored in the content reproduction apparatus such that the device key cannot be accessed from outside of the content reproduction apparatus, the content reproduction apparatus decrypting an encrypted digital content using the stored device key to reproduce a digital content, the content reproduction apparatus storing index information that indicates the stored device key, and the index information being stored in the content reproduction apparatus such that the index information is accessed from outside of the content reproduction apparatus, the content reproduction apparatus being connected to a display apparatus that is distinct from the content reproduction apparatus, and the program causing the content reproduction apparatus to execute a method comprising:
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transmitting user identification information to a user authentication server located outside of the content reproduction apparatus, the user authentication server performing user authentication based on the user identification information received from the transmitting of the user identification information, and the user authentication server performing transmitting of an instruction for outputting the index information stored by an index information storage unit of the content reproduction apparatus, based on a result of the authentication performed by the user authentication server; receiving, from the user authentication server, the instruction for outputting the index information from the index information storage unit of the content reproduction apparatus; converting the stored index information into a data format that is displayable on a screen of the display apparatus, the stored index information being converted based on the received instruction; and outputting only the converted index information to the display apparatus to cause the display apparatus to display the index information converted by the video processing unit.
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Specification