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Proceedings of the 13th Italian Meeting of Afro-Asiatic Linguistics, (Ed., con G.F. Grassi)
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Synchronizing Hyperchaos using a Scalar Signal: A Unified Framework for Systems with One or Several Non-linearities
No full textA system theory approach for designing cryptosystems based on hyperchaos
No full textIn this paper a general methodology for designing chaotic and hyperchaotic cryptosystems is developed. The basic idea is to make the decrypter a nonlinear observer for the state of the encrypter. Referring to this concept, some propositions are given which enable the plaintext to be retrieved if proper structural properties of the chaotic system hold. The proposed tool proves to be powerful and flexible, since a wide class of cryptosystems can be designed by exploiting different chaotic and hyperchaotic circuits. The advantages of the suggested approach are illustrated in detail. In particular, the utilization of hyperchaos-based cryptosystems, as well as the increased complexity of the transmitted signal, make a contribution to the development of communication systems with higher security
Synchronization of high-order oscillators by observer design with application to hyperchaos-based cryptography
No full textThe aim of this paper is to make a contribution in the context of both hyperchaos synchronization and cryptography. The approach illustrated herein, which exploits the concept of observer from system theory, is at first applied for synchronizing via a scalar signal two recent examples of high-order oscillators, characterized by several positive Lyapunov exponents. Successively, an example of hyperchaos-based cryptography is illustrated. The advantages of the proposed tool are discussed in detail. In particular, the utilization of both synchronization of complex dynamics and cryptography seems to make a contribution to the development of communication systems with higher security
Nonlinear observer design to synchronize hyperchaotic systems via a scalar signal
No full textIn this brief control theory is used to formalize hyperchaos synchronization as a nonlinear observer design issue, Following this approach, a new systematic tool to synchronize a class of hyperchaotic systems via a scalar transmitted signal is developed, The proposed technique has been applied to synchronize two well-known hyperchaotic systems
Antihypertensive mechanisms of lipid-lowering drugs: decoding the Rosetta stone's inscriptions'.
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