Outsourcing Access Control for a Dynamic Access Configuration of IoT Services Topics: Algorithms, software engineering and development; Architecture for secure and interactive IoT; Information systems related issues; IoT Services and Applications; Performance Evaluation and Modeling ; Security as a Service including any Algorithms, Methodology and Software Proof-of-concepts; Security, Privacy and Trust ; Software Architecture and Middleware ; System design and implementation; Trust and privacy In Proceedings of the 2nd International Conference on Internet of Things, Big Data and Security IoTBDS - Volume 1, 59-69, 2017 , Porto, Portugal