MANAGING DATA OBJECT IN DYNAMIC, DISTRIBUTED AND COLLABORATIVE CONTEXT

摘要

PROBLEM TO BE SOLVED: To protect data objects by a computer.

SOLUTION: A data object 22 is encrypted with a content encryption key (CEK). The content encryption key (CEK) is encrypted with a key encryption key (KEK) of a control policy corresponding to the data object 22. A control policy tag 23 corresponding to the data object 22 may be recorded. A storing step of storing the encrypted content encryption key (CEK) in the control policy tag 23 may be provided. The content encryption key (CEK) stored in the control policy tag 23 may be decrypted with the cached key encryption key (KEK), and the data object 22 may be decrypted with the decrypted content encryption key (CEK).

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