Although it is never possible to fully prevent the unauthorized use of
             information from people with security clearances and access, the use of
             security clearance and access is important to ensure that people without
             security clearance cannot access the confidential information. In other
             words, the concept of `absolute security' is a chimera. It is the nature
             of security that makes it necessary to weigh up the threats, the risks, the
             harm arising, and the cost of safeguards (Bach, 1986). A balance must be
             found between predictable costs and uncertain benefits, in order to select
             a set of measures appropriate to the need.
             In most of the cases, the risks of security clearance involve on the
             personal integrity, trustworthiness, and honesty than the information
             systems (IS) security measures. Even if IS security measures are handled
             to monitor and control all of the keystrokes of the computers, there are
             instances of unauthorized information because of personal negligence, such
             as one may leave inadvertently classified material left unattended. Also,
             computer diskettes, CDs, carbon paper, and used typewriter ribbons may pose
             a problem when doing a security check, as a visual examination of these
             items does not tell whether the items contain classified information
             Although to prevent the unauthorized use of information, information
             can be disaggregated at several locations, without providing networks
             communications between these locations. However, this kind of measure is
             neither cost-effective nor productive, because where people are trustworthy
             and they need such information for authorized uses will have access to such
             information in bits and pieces from several locations. It would not only
             create time delay in accessing all of the needed information, but it would
             create much difficulty in putting all of the information in order.
             However, when data are in a datab...