Other ; This report documents the program and the outcomes of Dagstuhl Seminar 16342 "Foundations of Secure Scaling". This seminar hosted researchers in secure electronic system design, spanning all abstraction levels from cryptographic engineering over chip design to system integration. We recognize that scaling is a fundamental force present at every abstraction level in electronic system design. While scaling is generally thought of as beneficial to the resulting implementations, this does not hold for secure electronic design. Indeed, the relations between scaling and the resulting security are poorly understood. This seminar facilitated the discussion between security experts at different abstraction levels in order to uncover the links between scaling and the resulting security.