This paper presents a detailed description of different technologies and home automation systems from a security point of view. This paper highlights various security flaws in existing home automation systems and how the concept of security and the meaning of the word “intruder” have evolved over time.  We studied the challenges in home automation security from point of view of home owner and security provider. This work considers home automation systems like central controller based home automation systems, context-aware home automation systems, Bluetooth-based home automation systems, Short Messaging Service-based home automation systems, Global System for Mobile communication or mobile-based home automation systems, and Internet-based home automation systems. The work is concluded by giving future directions home automation Security Research.