It was a pleasure to take part in the 2005 European Workshop on Security and Privacy in Ad Hoc and Sensor Networks (ESAS 2005), held on July 13 14 in Visegrad (Hungary) in conjunction with the First International Conference on Wireless Internet (WICON) . As Program Co-chairs, we are very happy with the outcome of this year s ESAS workshop. It clearly demonstrates the continued importance, popularity andtimeliness oftheworkshop stopic: securityandprivacy inadhocandsensor networks.Atotalof51fullpapersweresubmitted.Eachsubmissionwasreviewed by at least three expert referees. After a short period...

This book constitutes the proceedings of the 11th International Conference on Network and System Security, NSS 2017, held in Helsinki, Finland, in August 2017. This volume also contains 35 contributions of the following workshops: Security Measurements of Cyber Networks (SMCN-2017);