Cryptography – Key management
Reexamination Certificate
2004-04-16
2008-09-02
Laforgia, Christian (Department: 2139)
Cryptography
Key management
C434S322000, C434S365000, C726S027000, C713S189000
Reexamination Certificate
active
07421081
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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Pei Yun Zhang
Shao Ling
Xie Dong
Zhang Jian
Goldman Richard M.
Laforgia Christian
Shimokaji & Associates P.C.
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