Prior to co-founding Duo Security where he serves as CEO, Dug Song spent seven years as founding chief security architect at Arbor Networks, developers of network software that protects 80 percent of the world's Internet service providers. Before Arbor, Song built the first commercial network anomaly detection system (acquired by NFR/Check Point), and managed security in the world's largest production Kerberos environment (University of Michigan). He is co-author of the SSL security protocol and lives in Ann Arbor, Michigan.