1. A safe embedded system is one that is designed to prevent harm, damage, or loss of life from failures. It uses measures like fail-safe behavior, redundancy, clustering, and event logging to ensure predictable and reliable performance. 2. A secure embedded system protects data, access, and communication from unauthorized access. It employs provisions like threat prevention and detection, access controls, cryptography, firewalls, and regular security updates. 3. Both safe and secure systems are important, as safe systems in fields like transportation and automation could have catastrophic consequences if compromised by attacks. For now, the preferred approach is to isolate safe systems on separate networks.