Ubiquitous devices comprising several resource-constrained sensors and actuators while having the long desired Internet connectivity, are becoming part of many solutions that seek to enhance user’s environment smartness and quality of living. Their intrinsic resource limitations however constitute critical requirements, such as security, a great challenge. When these nodes are associated with applications that might have an impact in user’s privacy or even become life threatening, the security issues are of primary concern. Access to these resources should be appropriately controlled to ensure that such wearable nodes are adequately protected. On the other hand, it is very important to not restrict access to only a very closed group of entities. This work presents a service oriented architecture that utilizes policy-based, unified, cross-platform and flexible access control to allow authenticated entities consume the services provided by wearable nodes while protecting their valuable resources.