The overall allowable APK installation package, there is a big security risk.
Although the operation is very convenient if the temptation to install the malware, install the ‘unknown source’ application is still possible to bring potential damage. Even if you initially installed a clean software or game app, but the malware makers can still use the ‘follow-up update’ way to download harmful data.
The latest version of the Android mobile operating system has made significant policy adjustments to the ‘unknown source’ application.
So in Android 8.0 Oreo, Google removed the easy to abuse the “allow unknown source” application of the switch. If you still want to install a developer who is trusted by their own app, you need to manually grant the “install unknown application” license.
