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Enterprise Information Systems Assurance and System Security: Managerial and Technical Issues

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Few topics in the information technology (IT) field today generate as much interest as
security. Interestingly, the IT world has been struggling with security issues for over 30
years, yet many security problems remain unsolved, unaddressed, and serious. As
those responsible for securing systems and networks address security issues by a
combination of hardware, software, procedures, policy, and the law, intruders and insiders
circumvent protection mechanisms, discover new and unpublished vulnerabilities,
or find lapses in an organization’s policy and procedure in their efforts to damage
systems, destroy data, or simply for mischief purposes. The attacker clearly has an
advantage in this struggle between those who protect and those who penetrate. While
the protector must close all vulnerabilities, the attacker need only find one to exploit.

Security in enterprise computing systems is also not simply a matter of technology and
cannot be addressed satisfactorily with hardware and software alone. It is also a matter
of managing people, establishing and enforcing strong (and correct) policies, implementing
procedures that strengthen security, and periodically checking the effectiveness
of the security architecture and making necessary changes. The provision of
security in any enterprise must also be tailored to that particular organization. While
the principles of computing security and common wisdom in the IT field are important,
the actual application of such principles depends largely on a number of factors that
often vary from enterprise to enterprise (e.g., confidentiality needs for data, customers,
access requirements, volatility of data value, and others). Those individuals responsible
for enterprise security must balance the need for security against the need for
access to their system (by customers and employees), must be concerned with the cost
of the security measures compared to the overall strength of the security architecture
being constructed, and must also be cognizant of how well the security perimeter is
performing. These are difficult tasks indeed. Success in these tasks requires vigilant
attention to many factors, and the successful security manager must constantly reeducate
him- or herself and his or her staff.
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