Method and apparatus for masking index values in a database

Details Method and apparatus for masking index values in a database Method and apparatus for masking index values in a database

2011-05-03

2011-05-03

Jalil, Neveen Abel (Department: 2165)

Data processing: database and file management or data structures

Data integrity

Index maintenance

C705S035000

Reexamination Certificate

active

07937375

ABSTRACT:
One embodiment of the present invention provides a system for masking index values in a database. During operation, the system receives a request to mask a column in a database, wherein the column is an index-column. Next, the system retrieves a tree which is used to index the column, wherein the tree provides a sorted representation of values in the column. The system then locates the root-node of the tree. Then, for each child-node in the tree, the system determines if the child-node is a leaf-node. If so, the system masks a node-value for the leaf-node without resorting the tree. If not, the system leaves the node-value unmasked.

REFERENCES:
patent: 5787274 (1998-07-01), Agrawal et al.
patent: 6012064 (2000-01-01), Gibbons et al.
patent: 6587466 (2003-07-01), Bhattacharya et al.
patent: 2005/0144176 (2005-06-01), Lei et al.
patent: 2008/0104102 (2008-05-01), Zhang
patent: 2009/0006314 (2009-01-01), Balmin et al.

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