Katie Moussouris is an American computer security researcher, entrepreneur, and pioneer in vulnerability disclosure, and is best known for her ongoing work advocating responsible security research. Previously a member of @stake, she created the bug bounty program at Microsoft and was directly involved in creating the U.S. Department of Defense's first bug bounty program for hackers. She previously served as Chief Policy Officer at HackerOne, a vulnerability disclosure company based in San Francisco, California, and currently is the founder and CEO of .