International Journal of Chaos, Control, Modelling and Simulation

Synchronization and Inverse Synchronization of Some Different Dimensional Discrete-time Chaotic Dynamical Systems via Scaling Matrices   Adel Ouannas LAMIS Laboratory, Department of Mathematics and Computer Science, University of Tebessa, 12002, Algeria Abstract In this paper, new types of synchronization and inverse synchro-nization are proposed for some di¤erent dimensional chaotic dynamical systems in discrete-time using scaling matrices. Based on Lyapunov stability theory and nonlinear controllers, new synchronization results are derived. Numerical simulations are used to verify the e¤ectiveness of the proposed schemes.  Keyword  Synchronization, inverse synchronization, chaotic dynamical sys-tems, discrete-time, Lyapunov stability More Details :   http://airccse.org/journal/ijccms/papers/3414ijccms01.pdf

Adaptive Control for the Stabilization and Synchronization of Nonlinear Gyroscopes B. A. Idowua, *RongweiGuob, U. E. Vincent c,d,* aDepartment of Physics, Lagos State University, Ojo, Nigeria.b School of Mathematics and Physics, Shandong Institute of Light Industry, Jinan250353, P.R. China. c Department of Physics, Redeemers University Nigeria, Ogun State, Nigeria. dNonlinear Biomedical Physics, Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom. Abstract  Recently, we introduced a simple adaptive control technique for the synchronizationand stabilization of chaotic systems based on the Lasalle invariance principle. The method is very robust to the effect of noise and can use single-variable feedback toachieve the control goals. In this paper, we extend our studies on this technique tothe nonlinear gyroscopes with multi-system parameters. We show that our proposedadaptive control can stabilize the chaotic orbit of the gyroscope to its stable equi...

CHAOTIC VARIATIONS OF AES ALGORITHM Chittaranjan Pradhan1and Ajay Kumar Bisoi 1School of Computer Engineering, KIIT University, Bhubaneswar,   India 2School of Computer Engineering, KIIT University, Bhubaneswar, india ABSTRACT Advanced Encryption Standard (AES) algorithm is considered as a secured algorithm. Still, some security issues lie in the S-Box and the key used. In this paper, we have tried to give focus on the security of the key used. Here, the proposed modified algorithms for the AES have been simulated and tested with different chaotic variations such as 1-D logistic chaos equation, cross chaos equation as well as combination of both. For the evaluation purpose, the CPU time has been taken as the parameter. Though the variations of AES algorithms are taking some more time as compared to the standard AES algorithm, still the variations can be taken into consideration in case of more sensitive information. As we are giving more security to the...