Sisir Kumar Jena is presently working as an Assistant Professor in the Department of CSE, DIT University, Dehradun. He was the HOD and Assistant Professor in the Department of CSE at Nalanda Institute of Technology, Bhubaneswar, India, during 2007-2015. He has more than 10 years of teaching experience and five years of experience as a Research Scholar at IIT Guwahati. He is pursuing his Ph.D. in Computer Science and Engineering at IIT, Guwahati, while writing this book. He has published many research papers and book chapters in refereed International Conferences and Journals. His interest area includes Digital VLSI Design and Testing, Approximate Computing, IoT, and Security in Hardware.