Resumo

NUNEZ, R. Evaluando las sincronizaciones sin y con retroalimentación en circuitos de Lorenz. Rev. mex. fis. [online]. 2011, vol.57, n.1, pp.84-90. ISSN 0035-001X.

Since the synchronization is essential for sending private information through chaotic encryption and parametric commutation, the paper describes an experimental study, on two synchronization schemes namely: without and with feedback, is performed using as a chaotic source the Lorenz circuit. The idea is to know the most efficient and robust for application in chaotic encryption. Transmitter and receiver circuits are implemented in a very similar way and worked in almost identical conditions of operation. It is considered a linear variation of the Rayleigh parameter to find the errors in the synchronization and the chaotic dynamics alterations of the circuits. To do this, we use phase planes, spectral analysis and coherence. Finally, synchronization with feedback has a higher synchronization error, decreases the chaotic dynamics and encryption capabilities and information signal retrieval are very committed; together requiring a physical connection more. It is less efficient than the synchronization without feedback, although for the latter further experimentation is needed on the behavior regarding to electrical noise, and instabilities of the components to come in real applications of chaotic encryption.

Palavras-chave : Lorenz circuit; chaotic circuits synchronization; chaotic encryption.

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