Worked on enhancing security documentation within the nrfconnect/sdk-nrf repository, focusing on clarifying the semantics of key persistence for lockable KMU keys and aligning maturity notes for TF-M and PSA Crypto features. The approach involved updating reStructuredText (rst) documentation to improve user understanding and ensure proper usage of key management capabilities. By refining technical explanations and synchronizing terminology across related security modules, the work addressed gaps in existing documentation. The effort demonstrated attention to detail in documentation practices and a strong grasp of security concepts, contributing to more accessible and accurate guidance for developers working with embedded security features.