This book presents thoroughly revised versions of ten tutorial lectures given by leading researchers during three International Schools on Foundations of Security Analysis and Design, FOSAD 2007/2008/2009, held in Bertinoro, Italy, in September 2007, August 2008, and August/September 2009. The topics covered in this book include cryptographic protocol analysis, program and resource certification, identity management and electronic voting, access and authorization control, wireless security, mobile code and communications security.