Zdravko Karakehayov is an Associate Professor in the Department Computer Systems at the Technical University of Sofia, Bulgaria. Formerly he was with the Technical University of Denmark, Lyngby and the University of Southern Denmark, Sonderborg . Dr. Karakehayov received the Ph.D. and D. Sc. degree in computer science from the Technical University of Sofia, Bulgaria. He is a senior member of the IEEE Computer Society and Computer Society Distinguish Visitors Program Speaker. He authored six books in the field of embedded systems and holds eight patents. His research field includes low-power design for embedded systems, low-power and secure routing for wireless sensor networks. Dr. Karakehayov served as a reviewer for the Journal Transactions on Embedded Computing Systems and several international conferences.