Database system providing encrypted column support for applications
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United States of America Patent
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Sep 14, 2010
Grant Date -
Feb 7, 2008
app pub date -
Aug 17, 2007
filing date -
Sep 3, 2004
priority date (Note) -
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Abstract
A database system providing encrypted column data support with decrypt default functionality. In a database system, a method providing automated encryption support for column data comprises steps of: defining Structured Query Language (SQL) extensions for creating and managing column encryption keys and database tables with encrypted column data; receiving an SQL statement specifying creation of a column encryption key; receiving an SQL statement specifying creation of a database table having particular column data encrypted with the column encryption key; receiving an SQL statement specifying a default value to be provided in response to requests for the column data without decrypt permission; in response to a subsequent database operation requesting encrypted column data from a user with decrypt permission, automatically decrypting the column data; and in response to a subsequent database operation requesting the encrypted column data from a user without decrypt permission, returning the default value.
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