Idea of Fingerprint Icon
This looks like a zoomed-in finger print. There are many lines that start in the bottom right, curving up and to the left, and then ending in the bottom left. There's many breaks in the lines.
This Fingerprint 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.