Method and apparatus for generating hierarchical keys of digital assets
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United States of America Patent
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Sep 2, 2008
Grant Date -
Oct 28, 2004
app pub date -
Apr 16, 2004
filing date -
Apr 22, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for generating hierarchical keys of digital assets, the digital assets are arranged as at least one tree structure for management, a root node of the tree structure represents the complete set of the digital assets, other group nodes represents sub-sets in each level of the digital assets respectively, and the nodes in the lowest level are leaf nodes, said method includes: generating the key of the root node; and starting with the key of the root node, using the key of a father node to compute level by level the keys of its child nodes according to a predetermined function, through to leaf nodes.
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