The key ingredient that drives your business today is information. That's because most businesses cannot function if this ingredient is not available or is unreliable. Availability, integrity and confidentiality of information are paramount concerns today. The manufacturing records, sales records, financial records, customer records are all kept on computers. In today's networked world, these may be accessible from anywhere, via the Internet. Organizations can't be too sure that all digitized information is secure. Organizations want to be able to take advantage of the Internet for electronic commerce, advertising, information distribution and access, and other pursuits, but they are worried about the possibility of being “hacked.” In their search for a way to approach the problem, organizations came to realize that one of the best ways to evaluate the intruder threat to their interests would be to have independent computer security professionals attempt to break into their computer systems. This scheme is similar to having independent auditors come into an organization to verify its bookkeeping records.