Method for controlling database copyrights
First Claim
1. A method for controlling copyright of digital data encrypted and supplied from a database to a user, wherein:
- a utilization permit key including a decryption key for said digital data is supplied from a key control center to said user;
said utilization permit key comprising at least one of the following;
a display permit key for displaying said digital data, an edit permit key for editing said digital data, a storage permit key for storing said digital data, a copy permit key for copying said digital data, a transfer utilization permit key for transferring said digital data; and
said user decrypts said digital data using said permit key and performs at least one of the following operations as provided by said utilization permit key;
displays said digital data, edits said digital data, stores said digital data, copies said digital data, transfers said digital data.
6 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a method for controlling copyrights of digital data in a database system including real time transmission of a digital picture. Copyrights are controlled using one or more of the following, as necessary, in addition to a permit key: a copyright control program, copyright information or copyright control message. The copyright control program, the copyright information and the copyright control message are supplied together with the permit key, or they are supplied together with the data. Otherwise, a part of them is supplied together with the permit key and the other part of them is supplied together with the data. The data, the permit key, the copyright control message, the copyright information and the copyright control program are (1) transmitted while encrypted, but are decrypted when used, or (2) they are transmitted while encrypted and decrypted for display only, otherwise remaining encrypted, or (3) they may not be encrypted at all.
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Citations
22 Claims
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1. A method for controlling copyright of digital data encrypted and supplied from a database to a user, wherein:
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a utilization permit key including a decryption key for said digital data is supplied from a key control center to said user;
said utilization permit key comprising at least one of the following;
a display permit key for displaying said digital data, an edit permit key for editing said digital data, a storage permit key for storing said digital data, a copy permit key for copying said digital data, a transfer utilization permit key for transferring said digital data; and
said user decrypts said digital data using said permit key and performs at least one of the following operations as provided by said utilization permit key;
displays said digital data, edits said digital data, stores said digital data, copies said digital data, transfers said digital data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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12. A method for controlling copyright of digital data encrypted and supplied from a database to a user, wherein:
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a permit key including a decoding key for said digital data is supplied from a key control center to said user;
said permit key comprising at least one of the following use permit keys;
a display permit key for displaying said digital data, an edit permit key for editing said digital data, a storage permit key for storing said digital data, a copy permit key for copying said digital data, and a transfer permit key for transferring said digital data;
said user performs at least one of the following operations using said permit key;
displays said digital data, edits said digital data, stores said digital data, copies said digital data, transfers said digital data;
said digital data encrypted is decrypted when said digital data is displayed and edited; and
said digital data is encrypted again when said digital data is subjected to one of the following operations;
storing, copying, transferring.
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Specification