This book constitutes the refereed post-proceedings of the First International Workshop on Eternal Systems, EternalS 2011, held in Budapest, Hungary, in May 2011. The workshop aimed at creating the conditions for mutual awareness and cross-fertilization among broad ICT areas such as learning systems for knowledge management and representation, software systems, networked systems and secure systems, by focusing on their shared objectives such as adaptation, evolvability and flexibility for the development of long living and versatile systems. The 6 revised full papers and 4 short papers...

This book constitutes the refereed proceedings of the 4th International Symposium on Engineering Secure Software and Systems, ESSoS 2012, held in Eindhoven, The Netherlands, in February 2012. The 7 revised full papers presented together with 7 idea papers were carefully reviewed and selected from 53 submissions. The full papers present new research results in the field of engineering secure software and systems, whereas the idea papers give crisp expositions of interesting, novel ideas in the early stages of development.