This volume constitutes the refereed proceedings of the 4th International Conference on Information Security and Assurance, ISA 2010, held in Miyazaki, Japan, in June 2010. The 30 revised full papers presented in this volume were carefully reviewed and selected from 280 submissions. The concepts of Security and Assurance are emerging rapidly as an exciting new paradigm to provide reliable and safe life services. The papers focus on the various aspects of advances in information security and assurance and present recent progress in the area of information security and assurance including modeling, simulation and novel applications associated with the utilization and acceptance of computing devices and systems.
