Idea of Validation Icon
This icon for password check is a rectangle with rounded edges. Inside of the rectangle there are three circles placed horizontally next to one another. In the bottom right corner of the rectangle is a circle overlapping the corner, with a check mark in its center.
This Validation icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.