This book introduces readers to the application and implementation of Soft Systems Methodology (SSM) for problem-solving purpose as well as the Information Systems Security Model designed for solving the security issues in the Ethiopian banking industry. During this research, Five Ethiopian Banks have been chosen as a sample population by using the purposive sampling technique. At last, SSM is then proposed as a methodology in order to develop a model which could enhance the existing security problems that have been faced by the Ethiopian Banks.