Idea of Padlock Icon
This icon looks just like a padlock. The base of the lock is a square with slightly rounded edges. There is a circular shape in the center that looks just like where you would place a key. The hasp of the lock is on top and is simply a half circle tilted slightly to the left to indicate the lock is open.
This Padlock icon has Android KitKat style
. If you use the icons for Android apps, we recommend using our latest Material Icons icon pack (please check our sidebar on the right). Otherwise, it's a solid icon pack that looks good in small resolutions, either on the web or in print. It's characterized by thick lines, smooth corners, and is optimized for 24x24 pixels.