||Fundamental of Computer security. Risk analysis in Computer security. Hardware and software Security Control, Viruses. Encryption and Cryptography Techniques. SecurityModels. Telecommunication security: Fundamental, Issues, Objective and threats, Security Services, Distributed system Security, The trusted network Interpretation, TNI Security Services, AIS interconnection issues, firewalls (gateway Application, cost and effectiveness). Database security: security of Multi-level database. Legal Issue and current legislation: Computer Crime, software violation, Crimes Privacy considerations, corporate policy, Managerial Issues, government-based security standards.