Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-04-13
2010-11-02
Pyzocha, Michael (Department: 2437)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C380S282000, C726S027000, C713S193000, C707S709000, C707S710000
Reexamination Certificate
active
07827403
ABSTRACT:
One embodiment of the present invention provides a system that decrypts an encrypted column in a row. During operation, the system receives the encrypted column in the row. The system then determines a security domain associated with the encrypted column in the row, wherein the security domain represents a set of columns in rows encrypted using the same key. Next, the system determines a key associated with the security domain. The system then decrypts the encrypted column in the row using the key. Note that using a security domain to represent a set of columns in rows enables the database to grant access to data within the database at arbitrary levels of granularity.
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Lei Chon Hei
Wong Daniel Man-Hung
Fields Courtney D
Oracle International Corporation
Park Vaughan Fleming & Dowler LLP
Pyzocha Michael
Sahrasbuddhe Laxman
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