The problem of protecting information has existed since information has been managed. However, as technology advances and information management systems become more and more powerful, the problem of enforcing information security also becomes more critical [1] . The massive use of the communication networks for various purposes in the past few years has posed new serious security threats and increased the potential damage that violations may cause. As organizations are increasing their reliance on computer network environments, they are becoming more vulnerable to security breaches. Private and public sectors more than ever today depend on the information they manage. A violation to the security of the information may jeopardize the whole system working and cause serious damages. Advances in artificial neural networks (ANNs) provide effective solutions to this problem [2] , section 5 provides more details on ANNs.