This chapter discusses the next steps in big data management and analytics and big data security and privacy. It focuses on particular communication scenarios in the context of wireless networks' energy efficiency. The chapter provides an overview of the Internet of things (IoT) and various security issues for IoT and discusses the big data problem for IoT systems. The increasing complexity of cyberspace due to the IoT with heterogeneous components, such as different types of networks, diverse computing systems, and multiple layers of software, results in massive security vulnerabilities as any of the the data generated could be attacked. The architecture will depend on whether the IoT is for smart home or a smart grid or some other critical infrastructure. Control systems are usually composed of a set of networked agents, consisting of sensors, actuators, control processing units such as programmable logic controllers and communication devices.