English to Dutch Tech/Engineering Computers: Systems, Networks datacenter

XXX’s racks are located in closed areas, which are exclusively used by XXX. Each area is a separate security zone. To reach these areas further security zones need to be passed. Additionally, each rack is locked individually. A *sheathing safety system*, video surveillance, motion sensors in each area, and periodical security patrols further protect the facility.

Het gaat om een beveiligingssysteem in een datacenter. In het Duits is het volgens mij Außenhautsicherung, maar hoe luidt de vertaling in het Nederlands?