Chapter 07:

1. Flash encryption. When it is enabled, the firmware on the flash cannot be reverse-engineered.
2. A secure channel is not required for OTA updates, but it creates a security hole to be exploited by intercepting the network traffic to obtain the new firmware. The best practice is to do OTA updates over a secure channel.
3. The RainMaker platform does require mutual authentication with devices.
4. ESP Insights is a tool to monitor ESP32 devices in the field remotely.
5. All of them are important. Each component in an IoT solution creates an attack surface for hackers.