Android is built on top of Linux Kernel. In Unix based machines such as Linux, we see two types of user accounts – normal user accounts and root accounts. Normal user accounts usually have low privileges and they need permission from root to perform privileged operations such as installing tools, making changes to the Operating System, and so on. Whereas root accounts have all the privileges such as applying updates, installing software tools, ability to run any command, and so on. Essentially, this account has granular control over the whole system. This privilege separation model is one of the core Linux security features.

As mentioned earlier, Android is an operating system built on top of Linux Kernel. So many features that we see in traditional Linux systems will also be present in Android devices. Privilege separation is one among them. When you buy a brand new Android device, technically you are not the owner of your device, meaning you will have limited control over...