chapter 1. Introduction / Novarun Deb, Manali Chakraborty, and Nabendu Chaki -- chapter 2. Architecture and organization issues / Manali Chakraborty, Novarun Deb, Debdutta Barman Roy, and Rituparna Chaki -- chapter 3. Routing for ad-hoc networks / Debdutta Barman Roy and Rituparna Chaki -- chapter 4. Different types of attacks for WANs / Debdutta Barman Roy and Rituparna Chaki -- chapter 5. Honesty and trust-based IDS solutions / Novarun Deb, Manali Chakraborty, and Nabendu Chaki -- chapter 6. Blackhole attack detection technique / Debdutta Barman Roy and Rituparna Chaki -- chapter 7. Intrusion detection for wireless mesh networks / Novarun Deb, Manali Chakraborty, and Nabendu Chaki -- chapter 8. Future trends in WAN security / Tapalina Bhattasali, Manali Chakraborty, and Nabendu Chaki.