Idea of Lock Icon
The image is the basic rounded outline of a padlock. The padlock has a U-shaped part sticking out the top where you would loop it through the thing your are locking. Currently it is in the locked position. In the middle of the main, round, body of the lock is a keyhole where the pins of the key would go in pointing down.
This is the Lock icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.