This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Lockred.svg Red closed lock designed to flag sources that are not free to read free as in gratis and require paid subscription or some other form of payment to view Note en Adaptation of en File Freetoreadlock svg with consistent name for the series of locks own Headbomb other versions other fields cczero Lock symbols