100 Days of System Design Questions challenges

Design a distributed messaging system that allows for real-time communication between users across various devices and platforms. The system should support features such as one-to-one messaging, group messaging, multimedia messaging, and message delivery status tracking. Consider factors such as scalability, fault tolerance, message ordering, and message persistence in your design. Discuss how you would handle user authentication, message encryption, and access control to ensure data privacy and security. Additionally, address message routing, load balancing, and latency optimization to provide a seamless messaging experience. Provide insights into the technologies, protocols, and architectural patterns you would employ to build and deploy this distributed messaging system effectively.