Database Reference
In-Depth Information
Figure 5.7
The ER diagram for the timesheet system used in the implementation.
5.4.2 SELECT Query
The following experiments define the impact of changing the number
of tuples, the number of attributes, and the number of security levels on
the performance of the multilevel relational database security models
and the encryption-based multilevel database model when execut-
ing the selection query. The overhead of the decryption is included
in the evaluation of the performance of the multilevel data retrieval.
The where clause in the SELECT query is taken into consideration
when we evaluate the performance of the multilevel database security
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