The PERFORM Performability Engineering Research Group at the University of Illinois at Urbana-Champaign conducts research in the design and validation of dependable and secure networked systems. Such systems often have requirements for high performance, dependability, and security, and these goals may contradict one another. By providing a unified method to validate system performance, dependability, and security during the entire design process, the group develops and applies sound engineering principles to large-scale system design.