IBM Secure Service Container
IBM Secure Service Container is the trusted execution environment available for IBM Z and IBM LinuxONE servers. == History == In 2016 IBM introduced the z Appliance Container Infrastructure ("zACI") feature for the IBM z13, z13s, LinuxONE Rockhopper, and LinuxONE Emperor servers, delivered via a driver update (driver level 27).
Source: Wikipedia — IBM Secure Service Container (CC BY-SA 4.0)