# title
Stack sealing and why it is needed in TrustZone for Armv8-M

# topic.label
Armv8-M Architecture-Stack sealing and why it is needed in TrustZone for Armv8-M

# metadata.contentDescription
This document explains what stack-sealing is - an operation that is applicable to Secure firmware running on Armv8-M processors with TrustZone Security Extension enabled. It also covers how it helps dealing with security threats from untrusted software.