It’s a padlock. The bottom is square with rounded edges. Inside the square is four filled in circles in a line from the left to the right. On top of the square is an eclipse shape symbolizing the hooped part of the lock.
This is the Password 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.