A New Key Generator Based on an Auto-Switched Hybrid Chaotic System and Its FPGA Implementation

In this chapter, a new key generator is presented, which is constructed by an auto-switched numerical resolution of multiple three dimensional continuous chaotic systems (Lorenz, Rôssler, Chen) that excite a discreet chaotic system (Henon Map). The designed chaotic system provides complex chaotic attractors and can change its behavior automatically via a chaotic switching rule. The originality of the proposed architecture is that it allows to solve the problem of finite precision due to digital implementation while providing a good compromise between high security, performance, and hardware resources (low power and cost). Hardware digital implementation and FPGA circuit experimental results of this generator demonstrate that this promising technique can be applied in efficient embedded ciphering communication systems. Moreover, the proposed chaotic system should be very useful for reducing negative influence of dynamical degradation in real-time embedded applications.