Encrypted Audio Communication Based On Synchronized Unified Chaotic Systems

In this paper, encrypted audio communications based on synchronization of coupled unified chaotic systems in master-slave configuration is numerically studied. We transmit the encrypted audio messages by using two unsecure channels. Encoding, transmission, and decoding audio messages in chaotic communication is presented.

• C. Cruz-Hernández
• E. Inzunza-González
• R.M. López-Gutiérrez H. Serrano-Guerrero
• E.E.García-Guerrero

• Audio encrypted
• chaos
• synchronization.

[1] L. M. Pecora and T.L. Carroll, Synchronization in chaotic systems, Phys.
Rev. Lett. 64, 821-824 (1990).
[2] H. Nijmeijer and I. M. Y. Mareels, An observer looks at synchronization,
IEEE Trans. Circuits Syst. I, 44 (10), 882-890 (1997).
[3] C. Cruz-Hernández and H. Nijmeijer, Synchronization through filtering,
Int. J. Bifurc. Chaos, 10 (4), 763-775 (2000).
[4] D. López-Mancilla and C. Cruz-Hernández, Output synchronization of
chaotic systems: model-matching approach with application to secure
communication, Nonlinear Dynamics and Systems Theory, 5 (2), 141-
15 (2005).
[5] H. Sira-Ramírez and C. Cruz-Hernández, Synchronization of chaotic
systems: a generalized Hamiltonian systems approach, Int. J. Bifurc.
Chaos, 11 (5), 1381-1395 (2001).
[6] A.C.J. Luo, A theory for synchronization of dynamical systems, Commun.
Nonlinear Sci. Numer. Simulat., 14 (5), 1901-1951 (2009).
[7] C. Cruz-Hernández and A.A. Martynyuk, Advances in chaotic dynamics
with applications, Cambridge Scientific Publishers Ltd., Vol. 4, (2009).
[8] U. Feldmann, M. Hasler and W. Schwarz, Communication by chaotic
signals: the inverse system approach, Int. J. Circuits Theory and Applications,
24, 551-579 (1996).
[9] J. Lu, X. Wu, and J. L├╝, Synchronization of a unified chaotic system
and the application in secure communication, Physics Letters A 305,
365-370 (2002).
[10] C. Cruz-Hernández, Synchronization of time-delay Chua-s oscillator
with application to secure communication, Nonlinear Dynamics and
Systems Theory 4 (1), 1-13 (2004).
[11] C. Cruz-Hernández and N. Romero-Haros, Communicating via synchronized
time-delay Chua-s circuits, Communications in Nonlinear Science
and Numerical Simulation, 13 (3), 645-659 (2008).
[12] C. Posadas-Castillo, R.M. L├│pez-Gutiérrez, and C. Cruz-Hern├índez,
Synchronization of chaotic solid-state Nd:YAG lasers: application to
secure communication, Commun. Nonlinear Sci. Numer. Simul. 13 (8)
1655-1667 (2008).
[13] R.M. L├│pez-Gutiérrez, C. Posadas-Castillo, D. L├│pez-Mancilla, and C.
Cruz-Hernández, Communicating via robust synchronization of chaotic
lasers, Chaos, Solitons and Fractals, 42 (1), 277-285 (2009).
[14] L. G├ímez-Guzm├ín, C. Cruz-Hern├índez, R.M. L├│pez-Gutiérrez, and E.E.
García-Guerrero, Synchronization of Chua-s circuits with multiscroll
attractors: Application to communication, Commun. Nonlinear Sci.
Numer. Simulat. 14, 2765-2775 (2009).
[15] C. Cruz-Hern├índez C., R. M.L├│pez-Gutiérrez, E. Inzunza-Gonz├ílez,
and L. Cardoza-Avenda├▒o, Network Synchronization of unified chaotic
systems in master-slave coupling, Procs. of ICCSA 2009, June 29-July
2, le Havre, Normandy, France, 56-60 (2009)
[16] J. L├╝, G. Chen, D. Cheng, and S. Celikovsky, Bridge the gap between
the Lorenz system and the Chen system, Int. J. Bifurc. Chaos, 12, 2917-
2926 (2002).
[17] E.N. Lorenz, Deterministic non-periodic flows, J. Atmos Sci. 20, 130-
141 (1963).
[18] G. Chen and T. Ueta, Yet another chaotic attractor, Int. J. Bifurc. Chaos
9, 1465-1466 (1999).
[19] J. L├╝ and G. Chen, A new chaotic attractor coined, Int. J. Bifurc. Chaos
12 (3), 659-661 (2002).