Description: The ‘Trust Boundaries’ refer to defined limits within a system where levels of trust change, indicating where security controls should be applied to protect sensitive data. This concept is fundamental in security architecture, especially in diverse computing environments, where data may be accessible from multiple locations and devices. The central idea is that one should not assume any part of a system is completely secure; instead, clear boundaries should be established to define which areas require greater protection. This involves implementing specific security measures, such as multi-factor authentication, data encryption, and network segmentation, to mitigate risks. Zero trust challenges the traditional notion that users within a network are automatically trustworthy, promoting a more rigorous and proactive approach to security. In this context, trust boundaries help organizations identify and classify critical assets, ensuring that appropriate controls are applied based on the sensitivity of the information and the associated risk level. This approach not only enhances security but also facilitates compliance with data protection regulations and standards, which is essential in an increasingly complex and regulated digital environment.