Zabezpieczenia SSL and other 85,000 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
It is an emblem or a shield with the letters SSL inside of it right in the middle of the shield. There are four total points on the shield, one at the bottom, two on the top left and top right corner and then one rounded point slightly above the two corners.