What is this symbol? Hand under a shield with a check mark.

I have a symbol showing up in my notification bar that looks like a hand and shield. Shows up while I play a Sudoku app (so far that seems to be the only app) and the screen goes black. This doesn't pull down like the notifications normally do and I have to go back to the home screen to exit. This symbol looks almost exactly like this image at shutterstock website (stock-vector-check-mark-shield-and-hand-icon-vector-logo-template-795819220.jpg)
except it is all white
thanks for any help

from Android Forums at AndroidCentral.com - Ask a Question https://ift.tt/2OuAIsc
via IFTTT