Let's imagine we're building a Secure Content Management Platform. This isn't just about storing files; it's about ensuring confidentiality, integrity, and availability of sensitive data. Think of it as a highly secure vault where different departments (e.g., Legal, Finance, HR) can store and share documents, each with different access control needs and security policies. A key aspect is ensuring documents are only accessible to authorized personnel and that any modifications are auditable and potentially reversible. We also need to consider different types of security measures, such as encryption at rest, access control lists (ACLs), and versioning. The platform must be designed to prevent unauthorized access, data breaches, and accidental data loss. Further, the platform needs to support multiple types of content, including documents, images, and videos. Finally, this platform must allow content owners to be able to share the content with other platform users and external users while maintaining secure access.

Requirements