The company said by using these open-sourced APIs, developers can create algorithms to match two similar files without the original image or video: In May, following the Christchurch terrorist attack. Facebook partnered with The University of Maryland, Cornell University, and The University of California, Berkeley to research and develop technologies to detect manipulated photos and videos.  The company says it hopes developers and organizations take benefit of these libraries and share digital footprints of different types of harmful content. If developers can build a collective database of potentially harmful content, it can help organizations make digital platforms safe for users, and prevent them from encountering disturbing or offensive material. You can learn more about the announcement here and check out the GitHub library for the open-sourced technology here.