A Chaos Based Secure Communication Scheme for Hybrid Message Logging and Asynchronous Checkpointing for Mobile Computing

Robustness of cellular networks in case of handling faults still remains a daunting task. Mobile computing technology has rapidly become can indispensable mode in various e-commerce transactions along with voice and video communication. With these facilities comes the threat of security and integrity of information which are equally important to be tackled as the seamless transfer of data from remote locations to other remote or fixed locations and has currently drawn significant attention in the research community. The traditional ways of cryptography have been exhaustively explored during the past few decades. This chapter seeks ways to explore the implementation of a complex dynamic system in cryptographic application for another dynamic system. Mobile communications deals with a dynamic system characterized with intermittent disconnections. In the light of these facts, this work introduces fault tolerance technique with secure checkpointing and message logging while handling of mobile disconnections.We propose a secure communication technique and an efficient key management methodology for mobile computing environment based on the chaotic sequences generated by an optical chaos system with high fluctuating chaotic orbits. To the best of our knowledge, very little work has been done based on chaos cryptography in mobile computing. We propose a) A hybrid message logging and asynchronous checkpointing scheme at receiver’s end with an improved performance where messages exchanged by Mobile Hosts (MH) are logged at the stable base station b) The proposed message logging is made secure by introducing cryptography devised from a two-way coupled chaotic laser system derived from Maxwell Bloch’s equations. The entire process serves a dual purpose. Firstly, chaos synchronization would form a secure channel through which physical transfer of the private keys would be completely eliminated. Thereby, reducing the computational overhead incurred during the complex way of exchanging keys in Diffie Hellman Key Exchange (DHKE) protocol. Secondly,the inherent randomness and deterministic properties of chaotic system renders the scheme immune to major attacks. The entire scheme has been labeled as Chaos Key Exchange (CKE) method which uses the chaotic sequences generated by a synchronized chaotic laser system as the private keys to be used in cryptographic purpose. As a consequence, CKE forms as an efficient key management system used during encrypting messages involving voluminous data such as multimedia and images. The proposed logging process as well as the communication of messages has been made secure by applying CKE method.CKE has been demonstrated by encoding an image which is transmitted over a secure channel.The ergodicity of the chaotic system adds the necessary confusion and diffusion properties required for efficient cryptography.Simulation result highlight the merit of the scheme which precisely recovers the messages at the receiver section thereby proving the robustness of the scheme which is efficiently extended to achieve secure logging of the messages.