Design a secure cloud storage system that allows users to store and retrieve files while ensuring their data is secure. Consider aspects like data encryption, user authentication, access controls, and scalability. Discuss your approach for the overall system architecture and key components.

The system design of a secure cloud storage would encompass several key components: 1) **User Authentication** using protocols like OAuth. 2) **Data Encryption** both in transit and at rest, utilizing AES for sensitive files. 3) **Access Controls** using role-based access controls (RBAC) to ensure users can only access permitted files. 4) **Scalable Architecture** leveraging microservices to distribute workloads efficiently. Finally, implement logging and monitoring via a centralized dashboard to detect any anomalies. This design should ensure data privacy and integrity while maintaining user convenience.