Method of protecting and managing digital contents and system for using thereof
First Claim
1. A method of protecting digital contents, comprising the steps of:
- (a) receiving encrypted digital contents and a encrypted decryption key which is capable of decrypting said encrypted digital contents;
(b) generating a key from system information which represents personal unique system characteristic that a user uses so as to decrypt said encrypted decryption key; and
(c) decrypting said encrypted contents decryption key using said generated key and decrypting said encrypted digital contents to use.
1 Assignment
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Accused Products
Abstract
A method and system for protecting copyright of digital contents and contents themselves which are distributed. A user receives the encrypted digital contents and encrypted decryption key capable of decrypting the encrypted digital contents. A key is generated from the system information representing a user personal unique system characteristic and the encrypted contents decryption key is decrypted. Decrypting the encrypted contents decryption key is proceeded only when a key generated by extracting information of a personal system of the contents to be used by a user is identical to a decryption key of the encrypted contents decryption key. When the contents decryption key is decrypted, the encrypted contents are decrypted and generated using the above decrypted contents decryption key.
Such method approves only play/use of contents in the corresponding system, thereby preventing contents from being illegally used and distributed.
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Citations
21 Claims
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1. A method of protecting digital contents, comprising the steps of:
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(a) receiving encrypted digital contents and a encrypted decryption key which is capable of decrypting said encrypted digital contents;
(b) generating a key from system information which represents personal unique system characteristic that a user uses so as to decrypt said encrypted decryption key; and
(c) decrypting said encrypted contents decryption key using said generated key and decrypting said encrypted digital contents to use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for protecting and managing digital contents, comprising:
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digital contents managing means for establishing a database with digital contents to manage;
an encryption key generating means for generating a digital contents encryption key for encrypting digital contents in response to a transmission request of a user system;
a key managing means for storing and managing a user unique key generated using said contents encryption key and system unique information as to a user system to which said digital contents are transmitted;
contents encrypting means for encrypting said digital contents to be transmitted using said digital contents encryption key and said user unique key; and
contents providing means for controlling said key managing means in accordance with said transmission request of a user system, thereby transmitting said digital contents which are encrypted by said contents encrypting means to said user system. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification