RSA security key -
Phone Gap / Cordova

rsa

17 debug

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RSA security key

When you connect a device running Android 4.2.2 (API level 17) or higher to your computer, the system shows a dialog asking whether to accept an RSA key that allows debugging through this computer. This security mechanism protects user devices because it ensures that USB debugging and other adb commands cannot be executed unless you're able to unlock the device and acknowledge the dialog.
:

https://developer.android.com/studio...evice.html#rsa