Dan Geer is a security researcher with a quantitative bent. He is an electrical engineer (MIT), a biostatistician (Harvard), and someone who thinks truth is best achieved by adversarial procedures (school of hard knocks). He serves as the Chief Information Security Officer at In-Q-Tel. Among other things, his staff produced Kerberos and the X Window System, his cybersecurity consulting firm was the first on Wall Street, and he and a colleague run the Index of Cyber Security. He received the USENIX Lifetime Achievement Award in 2011 and was inducted into the Cybersecurity Hall of Fame in 2016.
See http://geer.tinho.net/pubs for the majority of his public work.