This book would provide a deep insight into the concept, applications and security challenges of an Internet of Things (IoT) technology. The IoT is a quite recent paradigm that is expected to boom in the coming years. It's definitely the good field for investments, research and improvements because it can offer nearly limitless opportunities. We strongly believe that such an area deserves a lot of our attention for a reason it can offer the progress and prosperity at the global scale. Also, the main drawback of that technology is still its security and from such a perspective - this effort would discuss some of the good practice approaches. We would consider that the biggest benefit of this book would be in a bit of the strategic point of view that would offer us an option to make the realistic impressions regarding the IoT technological advancements. This is so important because of the appropriate impact that could get obtained in that field being the consequence of the well-studied tactics and strategies. Finally, we would highlight that this book is not all in one effort, but rather the correlated set of the most significant topics.