Noam Arzt, has identified various threats to patient privacy related to the use of IIS. Threats to patient privacy have been divided into three categories. These are desktop threats, server threats and network threats. Desktop threats are threats related to desktop computers, whether it is a terminal or a personal computer. Server threats are threats related to the Immunization Information System (IIS) server and its integrity. Finally, network threats are threats related to the network that connects user workstations to IIS servers (Arzt,