David Choffnes’s work focuses on combining engineering and science to improve the performance, reliability, and security of internet systems. His work with the ReCon project improves user security by identifying and mitigating personal information leaks, and showed that Android poses a unique threat to personal security by allowing third-party libraries to capture screen contents. He is the executive director of the Cybersecurity and Privacy Institute, which aims to enhance digital security through collaborations between researchers and businesses.