Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2006-03-21
2010-11-16
Barron, Jr., Gilberto (Department: 2432)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C726S030000, C380S277000
Reexamination Certificate
active
07836313
ABSTRACT:
In a data storage system, content-containing objects to be stored are added to a storage hierarchy that is based on content relationships. The content of each stored object is encrypted and a stub is associated with that object. For each stored object other than a root object, the stub comprises a function of a decryption key for the content of that object and the stubs of all of the ancestors of that object. The stubs can be used to calculate a new stub for a data object to be inserted into the storage hierarchy and to generate a decryption key for an existing object. Since these latter calculations for an object involve the stubs of all ancestors of that object, deleting a stub for an object securely deletes that object and all its descendants. An object can be moved by recalculating its stub.
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Barron Jr. Gilberto
Brooks & Kushman P.C.
Le David
Oracle America Inc.
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