He has been active in the area of internetworking, network security and applied cryptography since 1987. He received his Ph.D. in Computer Science from the University of Southern California in 1991 for his work on access control in internetworks. Dr. Tsudik then moved on to IBM Research (1991-1996), and then USC Information Science Institute (1996-2000). Since 2000, he has been a faculty member at UC Irvine ICS Department. Over the years, his research has included: internetwork routing, firewalls, authentication, mobile network security, secure e-commerce, anonymity, secure group communication, digital signatures, key management, ad hoc network routing, and, more recently, database privacy and secure storage. Dr. Tsudik has over 60 referenced publications and 7 patents.