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US 8,046,302 B2Granted
Digital rights management method and system for content copyright protection
AssigneeSamsung Electronics Co., Ltd.
InventorTae-sung Kim
Life of this patent
Estimating the term…
Abstract
A Digital Rights Management (DRM) method and system for content copyright protection protect right information on DRM content and effectively manage the right information. The DRM system for content copyright protection includes: a time security module for providing time change information when a user arbitrarily changes time; and a time security list management module for providing the right information on content and the time change information.
Claims15
A Digital Rights Management (DRM) system for content copyright protection, the DRM system comprising:
- a time security module which determines time change information when a user arbitrarily changes a standard time related to a selected content to a changed time as a value of a difference between a value of the standard time, prior to being changed by the user, and a value of the changed time;
- and
- a time security list management module which manages content, right to use information related to the content and the time change information based on a tree structure comprising:
- a top node which stores the time change information, and
- nodes subordinate to the top node, wherein the subordinate nodes store the right to use information with an effective time information which is set when the subordinate node for a respective right to use information is created,
- wherein the time security module calculates a current time based at least on a sum of the value of the time change information stored in the top node and the value of the changed time,
- the right to use information of the selected content stored in a corresponding subordinate node is checked by the DRM system to determine whether the right to use information is effective based on comparing the current time with the effective time, and
- when new content and corresponding right information are added, the time security list management module generates a new top node higher than a current top node which becomes the top node in the tree structure, and
- at least one of the time security module and the time security list management module is embodied on a computer.
6 more elements
A Digital Rights Management (DRM) method comprising:
- determining time change information, by a time security module, according to an arbitrary change of a standard time related to a selected content, to a changed time, as a difference between a value of the standard time and a value of the changed time;
- managing the time change information, content and right to use information related to the content in a tree structure by a time security list management module, comprising:
- storing and managing the time change information in a top node of the tree structure, and
- storing and managing the right to use information in right-to-use nodes subordinate to the top node, which each right-to-use node comprises an effective time for the stored right to use information that is set when a respective right-to-use node is created;
- calculating a current time based on the value of the time change information stored in the top node and the value of the changed time;
- and
- determining whether the right to use information of the selected content stored in a corresponding right-to-use node is effective based on comparing the current time with the effective time,
- wherein when new content and corresponding right information are added, a new top node higher than a current top node is generated and becomes the top node in the tree structure, and
- at least one of the time security module and the time security list management module is embodied in a computer.
6 more elements
A method comprising:
- storing a content in a content node of a tree structure by a time security list management module;
- storing a right-to-use the content information in a right-to-use node of the tree structure by the time security list management module;
- setting an effective time for the stored right-to-use content information in the right-to-use node by the time security list management module;
- detecting an arbitrary time change related to the content by a time security module;
- determining a first current time related to the content by the time security module;
- determining a time change as a difference between the determined first current time and the detected arbitrary time change by the time security module;
- storing the determined time change in a top node of the tree structure by the time security list management module, the content and right-to-use nodes being subordinate to the top node;
- and
- confirming an effectiveness of the right-to-use the content by the time security list management module comprising:
- determining a second current time related to the content,
- determining an actual current time as a sum of the stored time change and the second current time, and
- comparing the effective time to the actual current time,
- wherein when new content and corresponding right information are added, a new top node higher than a current top node is generated by the time security list management module and becomes the top node in the tree structure, and
- at least one of the time security module and the time security list management module is embodied in a computer.
11 more elements
Dependencies are inferred from the claim text.