Data transfer system, data transfer apparatus, data recording apparatus, data transfer method, and recording medium
First Claim
1. A data transfer apparatus comprising:
- transfer means for transferring content data encrypted in a predetermined manner from a first recording means which can store encrypted content data to a first external apparatus and a second external apparatus;
discrimination means for making discrimination between said first external apparatus which can record only encrypted content data to a second recording means accommodated in said first external apparatus connected to said data transfer apparatus and said second external apparatus which can record only decrypted content data to a third recording means accommodated in said second external apparatus connected to said data transfer apparatus; and
if said first external apparatus is discriminated by said discrimination means, control means for decrementing a transfer count of the encrypted content data when transferring said encrypted content data from said first recording means to said first external apparatus, incrementing said transfer count when said encrypted content data are returned from said first external apparatus, and disabling the transfer of said content data from said first recording means to said first external apparatus if said transfer count has exceeded a predetermined limit value and,if said second external apparatus is determined by said discrimination means, said control means disabling the return of the encrypted content data from said second external apparatus.
1 Assignment
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Accused Products
Abstract
A SDMI-compliant portable medium and a non-SDMI-compliant portable medium can be selectively connected to a licensed compliant module. When transferring copyright-protected encrypted content data from the licensed compliant module, whether the destination of transfer is the SDMI-compliant portable medium or the non-SDMI-compliant medium is determined. When the destination is found to be the SDMI-compliant portable medium, the number of times the encrypted content data can be transferred is restricted. When the destination is found to be the non-SDMI-compliant portable medium, the return (or check-in) of the encrypted content data from the non-SDMI-compliant portable medium to the licensed compliant module is disabled.
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Citations
25 Claims
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1. A data transfer apparatus comprising:
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transfer means for transferring content data encrypted in a predetermined manner from a first recording means which can store encrypted content data to a first external apparatus and a second external apparatus; discrimination means for making discrimination between said first external apparatus which can record only encrypted content data to a second recording means accommodated in said first external apparatus connected to said data transfer apparatus and said second external apparatus which can record only decrypted content data to a third recording means accommodated in said second external apparatus connected to said data transfer apparatus; and if said first external apparatus is discriminated by said discrimination means, control means for decrementing a transfer count of the encrypted content data when transferring said encrypted content data from said first recording means to said first external apparatus, incrementing said transfer count when said encrypted content data are returned from said first external apparatus, and disabling the transfer of said content data from said first recording means to said first external apparatus if said transfer count has exceeded a predetermined limit value and, if said second external apparatus is determined by said discrimination means, said control means disabling the return of the encrypted content data from said second external apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A data transfer system having a data transfer apparatus and at least one of a first external apparatus and a second external apparatus which can be selectively connected to said data transfer apparatus, said data transfer apparatus comprising:
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transfer means for transferring content data encrypted in a predetermined manner from a first recording means which can store encrypted content data to said first external apparatus and said second external apparatus; discrimination means for making discrimination between said first external apparatus which can record only encrypted content data to a second recording means accommodated in said first external apparatus connected to said data transfer apparatus and said second external apparatus which can record only decrypted content data to a third recording means accommodated in said second external apparatus connected to said data transfer apparatus; and if said first external apparatus is discriminated by said discrimination means, control means for decrementing a transfer count of the encrypted content data when transferring said encrypted content data from said first recording means to said first external apparatus, incrementing said transfer count when said encrypted content data are returned from said first external apparatus, and disabling the transfer of said content data from said first recording means to said first external apparatus if said transfer count has exceeded a predetermined limit value and, if said second external apparatus is discriminated by said discrimination means, said control means disabling the return of the encrypted content data from said second external apparatus; said second external apparatus comprising; receiving means for receiving the content data encrypted in a predetermined manner from said transfer means; decryption means for decrypting said content data encrypted in a predetermined manner received by said receiving means; and recording means for recording said content data decrypted by said decryption means into said third recording means. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A data transfer method for transferring encrypted content data from a data transfer apparatus having a first memory which can store encrypted content data to a second memory accommodated in a first external apparatus connected to said data transfer apparatus and a third memory accommodated in a second external apparatus connected to said data transfer apparatus, said data transfer method comprising:
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discriminating between said first external apparatus which can record only encrypted content data to said second memory and said second external apparatus which can record only decrypted content data to said third memory; if said first external apparatus is discriminated, decrementing a transfer count of the encrypted content data when transferring said encrypted content data from said first memory to said first external apparatus, incrementing said transfer count when said encrypted data are returned from said first external apparatus, and disabling the transfer of said content data from said first memory to said first external apparatus if said transfer count has exceeded a predetermined limit value; and if said second external apparatus is discriminated, disabling the return of the encrypted content data from said second external apparatus. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A data recording apparatus which receives encrypted content data from a data transfer apparatus having a first recording medium storing said encrypted content data and records the received encrypted content data to a second recording medium, comprising:
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communication means for performing bidirectional communication with said data transfer apparatus; authentication processing means for performing authentication with said data transfer apparatus through said communication means; decryption means for decrypting said encrypted content data supplied from said data transfer apparatus through said communication means; recording means for recording said content data decrypted by said decryption means to said second recording medium; and control means for disabling the return of said content data from said second recording medium to said data transfer apparatus through said communication means.
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25. A recording medium storing a computer-readable program for transferring encrypted content data from a data transfer apparatus having a first memory storing said encrypted content data to a second memory accommodated in a first external apparatus connected to said data transfer apparatus and a third memory accommodated in a second external apparatus connected to said data transfer apparatus, said computer-readable program comprising:
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discriminating between said first external apparatus which can record only encrypted content data to said second memory and said second external apparatus which can record only decrypted content data to said third memory; if said first external apparatus is discriminated, decrementing a transfer count of the encrypted content data when transferring said encrypted content data from said first memory to said first external apparatus, incrementing said transfer count when said encrypted data are returned from said first external apparatus, and disabling the transfer of said content data from said first memory to said first external apparatus if said transfer count has exceeded a predetermined limit value; and if said second external apparatus is discriminated, disabling the return of the encrypted content data from said second external apparatus.
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Specification