Motivated by the growing convergence of diverse types of networks and the rise of concepts such as future internet (FI), in this paper, we analyze the coexistence of security mechanisms and quality of service (QoS) mechanisms in resource-constrained networks, that are relevant types of networks within the FI environment. More precisely, we analyze the current state of the research on security and QoS in the integration of wireless sensor networks, mobile ad hoc networks and cellular networks. Furthermore, we propose a taxonomy to identify similarities among these technologies, as well as the requirements for network interconnection. As a result, we define a dependency-based model for the analysis of security and QoS tradeoff, and also define a high-level integration architecture for networks in the FI setting. The final goal is to provide a critical point of view that allows to assess whether such an integration of networks can be both secure and efficient. Copyright © 2013 John Wiley & Sons, Ltd.