476 Copyright © 2011, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 21 Chaos Synchronization with Genetic Engineering Algorithm for Secure Communications Sumona Mukhopadhyay Army Institute of Management, India Mala Mitra Camellia School of Engineering and Technology, India Santo Banerjee Politecnico di Torino, Italy & Techfab, Italy 1. ChAOS SyNChRONIzATION AND CRypTOgRAphy The turning point in traditional schemes of cryptography was brought about by the revolutionary work of Pecora and Carroll (Pecora & Carroll, 1990). This opened a gateway to varied areas of applications of chaos synchronization namely secure communication, chaos generators design, chemical reactions, biological systems, information science (Hramov & Koronovskii, 2005a ; Garcia – Ojalio, & Roy, 2001; Yang & Chu 1997; Bowong, 2004; Kittel et al, 1994) and many more significant applications. ABSTRACT In this chapter, the authors have attempted to explore an association between chaos synchronization with genetic engineering algorithm. The authors developed a cryptographic technique using keys generated by time delayed synchronized systems by modifying the selection mechanism of the basic genetic algorithm. This has resulted into a proposed genetic engineering algorithm for cryptography which successfully deciphers the message. The observed results support the stated aim of the proposed genetic engineering algorithm that it is a reliable, effective and computationally cheaper substitute to the cryptography also developed here with (μ /ρ, λ)- selection scheme of Evolutionary strategy. A detail study is also presented with the analysis. DOI: 10.4018/978-1-61520-737-4.ch021