The logo shows two shapes indicating that you entered the wrong code. The shape on top is a long rectangle with four small circles in it, such as the diagram you see when you type in a PIN at an ATM. The shape below it is a circle with an X through it, denoting that it is incorrect.
Related to Wrong Pincode Icon
Related icons are the icons with matching tags, as well as all security icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors