His research interests include information and systems security, vulnerability and risk management, access and identity management, and security architecture for distributed systems. Ahn has a PhD in information technology from George Mason University. He serves as an associate editor for ACM Transactions on Information and System Security and an associate editor-in-chief for IEEE Transactions on Dependable and Secure Computing, and is a senior member of both IEEE and the ACM. Contact him at gahn@asu.edu.