The cloud relates to the “Cloud Computing”. In this case, applications, services or data are not stored on an inhouse server but on an internet server. There are open-source programmes such as Dropbox or Google Drive as well as paid services. In paid services, the data security takes a higher significance. More and more companies construct their own cloud environment with a special software. Important terms are “Infrastructure as a Service” (IaaS), “Platform as a Service” (PaaS) and “Software as a Service” (SaaS).