This book constitutes the revised selected papers of the 11th International Symposium on Foundations and Practice of Security, FPS 2018, held in Montreal, QC, Canada, in March 2018. The 16 full papers, 1 short paper, 1 position paper and 2 invited papers presented in this book, were carefully reviewed and selected from 51 submissions. They cover a range of topics including mobile security; cloud security and big data; IoT security; software security, malware analysis, and vulnerability detection; cryptography; cyber physical security and hardware security; and access control.

This book constitutes the thoroughly refereed post-conference proceedings of the 8th International Symposium on Foundations and Practice of Security, FPS 2015, held in Clermont-Ferrand, France, in October 2015. The 12 revised full papers presented together with 8 short papers and 2 keynote talks were carefully reviewed and selected from 58 submissions. The papers are organized in topical sections on RFID, sensors and secure computation; security policies and biometrics; evaluation of protocols and obfuscation security; spam emails, botnets and malware.