**Section 3 Routing Protocols 163**  Chapter 8 **Multihop Routing for Energy Efficiency in Wireless Sensor Networks 165**  Elias Yaacoub and Adnan Abu-Dayya Chapter 9 **Cross-Layer Design for Smart Routing in Wireless Sensor Networks 189**  Omar M. Sheikh and Samy A. Mahmoud **Section 4 Security Mechanisms 215**  Chapter 10 **Asymmetric Encryption in Wireless Sensor Networks 217**  Gustavo S. Quirino, Admilson R. L. Ribeiro and Edward David Moreno Chapter 11 **Reputation System Based Trust-Enabled Routing for Wireless Sensor Networks 233**

**Section 5 Localization & Positioning 287** 

A. R. Naseer

Chapter 12 **Distributed Range-Free Localization of Wireless Sensor Networks via Nonlinear Dynamics 289**  Shuai Li and Yangming Li
