Hands-On Edge Analytics with Azure IoT

Passwords and updates

In Chapter 6, Using MicroPython for Edge Analytics, we used a few microcontrollers as edge devices. Microcontrollers, such as Pycom's LoPy, use default usernames and passwords for both the WiFi access point and FTP file transfers. Not changing these parameters poses a significant security risk when these devices are put in production. To improve security, passwords should be changed from their default settings. It is also good practice to change passwords periodically. Passwords with a mixture of upper- and lowercase letters, numbers, and symbols are stronger than ones without that mixture. Password attacks that use common passwords would have a harder time breaking through devices with stronger and more cryptic passwords. ...