The rapid growth and widespread use of electronic data processing and electronic business conducted through the Internet, along with numerous occurrences of international terrorism, fuelled the need for better methods of protecting the computers and the information they store, process and transmit. The academic disciplines of computer security, information security and information assurance emerged along with numerous professional organizations – all sharing the common goals of ensuring the security and reliability of information systems. The security requirements of the Network environment are not unlike those of other distributed computing systems. Thus, having an internal control mechanism to assure the confidentiality, integrity and availability of data in a distributed environment is of paramount importance.