FUZZY OBSERVER DESIGN WITH n-SHIFT MULTIPLE KEY FOR CRYPTOGRAPHY BASED ON 3D HYPERCHAOTIC OSCILLATOR

Document Type: Research Paper

Authors

1 DEPARTMENT OF INSTRUMENTATION ENGINEERING, MIT CAMPUS, ANNA UNIVERSITY, CHROMEPET, CHENNAL-600044, INDIA

2 DEPARTMENT OF EEE, PONDICHERRY ENGINEERING COLLEGE, PONDICHERRY- 605014, INDIA

Abstract

A fuzzy observer based scheme for synchronizing two hyperchaotic
oscillators via a scalar transmitted signal for cryptographic application is
proposed. The Takagi-Sugeno fuzzy model exactly represents chaotic systems.
Based on the general fuzzy model, the fuzzy observer of a chaotic system is
designed on the basis of the n-shift multiple state based key encryption algorithm.
The scalar transmitted signal is designed in such a way that the hyperchaotic
carrier masks the encrypted signal, which in turn hides the message signal.
Simulation results show that the proposed scheme gives a better performance
even when a small additive stochastic noise is present in the channel.

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