Mobile IPv6 is an IP-layer protocol that is designed to provide mobility support. It allows an IPv6 node to arbitrarily change its location in the IPv6 network while maintaining the existing connection by handling the change of addresses at the Internet layer. Route optimization is standard in Mobile IPv6 to eliminate inefficient triangle routing. Return routability protocol was adopted by Internet Engineering Task Force (IETF), which is an infrastructureless, lightweight procedure used in route optimization. However, return routability protocol is to protect messages and is not able to detect or prevent an attacker which tampers against data. In this book, focus is given on Mobile IPv6 route optimization with enhanced security in terms of data integrity. It also provides a step-by-step implementation of Mobile IPv6 in real test-bed environment.