The Platform Security Architecture (PSA) is a framework to secure a trillion connected devices. It includes a holistic set of deliverables that fit into three key phases – Analyse, Architect, Implement.

Arm Trusted Base System Architecture for M Profile (TBSA-M) is an architecture specification and is a key deliverable of the “architect” phase. It defines the hardware requirements for Armv8-M based devices and includes best practice recommendations for Armv6-M and Armv7-M based devices.