FOSAD has been one of the foremost educational events established with the goal of disseminating knowledge in the critical area of security in computer systems and networks. Over the years, both the summer school and the book series have represented a reference point for graduate students and young researchers from academia and industry, interested to approach the field, investigate open problems, and follow priority lines of research. This book presents thoroughly revised versions of four tutorial lectures given by leading researchers during three International Schools on Foundations of Security Analysis and Design, FOSAD, held in Bertinoro, Italy, in September 2014, 2015 and 2016. The topics covered in this book include zero-knowledge proof systems, Java Script sandboxing, assessment of privacy, and distributed authorization.