The Internet of Things (IoT) is an emerging concept where interconnected devices and services collect, exchange and process data in order to adapt dynamically to a context. In the context of "Smart Home Environments" both IoT and traditional devices and services integrate in a home to enhance the quality of life of citizens. This allows improvements in several domains such as energy efficiency, health monitoring... New Smart Home devices and services appear at a fast pace, from various

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... rers, which may have a limited experience of cyber security. Yet, it is often necessary to integrate these devices in the "Home Area Network" in order to provide connectivity for data exchange and to perform their operations. In this paper, we present a Smart Home security system using Intel Galileo that employs the integration of cloud networking, wireless communication, to provide the user with features like gas leak detection, window and door break detection, motion detection through camera, smoke detection and smart lock etc. The system will automatically change based on sensors' data. This system is designed to be low cost and expandable allowing a variety of devices to be controlled. The designed system not only monitors the sensor data, like smoke, gas, lock, door, window, motion sensors, but also actuates a process according to the requirement, for example sending alert when gas leak detected. It also stores the sensor parameters in the cloud in a timely manner. This will help the user to analyze the condition of various parameters in the home anytime anywhere.