Appeal 2006-2937
Application 09/840,188
23, 1998, now US Patent 6,321,201 which is a § 371 filing of
PCT/SE97/01089 06/18/1997
We AFFIRM.
BACKGROUND
Appellant's invention relates to a data security system for a database. An
understanding of the invention can be derived from a reading of exemplary
claims 18 and 41, which are reproduced below.
18. A data processing method comprising:
maintaining a database containing a table of data in row
and column format, at least a portion of the data being
encrypted;
maintaining, separate from the table of data,
information for controlling access to a specified proper subset
of data in the table; and
controlling access to the specified proper subset of data
in the table according to the separately maintained information.
41. A method comprising:
providing a database containing a table having at least two
columns of data;
encrypting data in a first column using first cryptographic
information;
encrypting data in a second column using second
cryptographic information;
storing first and second cryptographic information outside
of the table;
2
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