As the world is moving towards Internet of Things, smart home is now rapidly becoming a reality. Home appliances and devices are interconnected, i.e., home area network, via proprietary or standard TCP/IP protocols allowing for better management and monitoring. Nevertheless, as with any form of network, smart home is also prone to security threats and vulnerabilities. This paper aims at presenting the importance of security in smart home environment. Herein, we will discuss (a) the concepts of smart home environment, (b) various smart home communication mechanisms, (c) security challenges and concerns in smart home environment, (d) security threats in smart home environment, (e) current security measures to encounter such security attacks and finally, conclusion and future work.