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Enhancing Privacy of Chaotic Communications by Double Masking

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2 Author(s)
Aromataris, G. ; Dipt. di Ing. Ind. e dell'Inf., Univ. degli Studi di Pavia, Pavia, Italy ; Annovazzi-Lodi, V.

In this paper, we numerically demonstrate that the performances of private transmission using chaotic lasers can be substantially improved by double masking the message by a suitable scheme. In addition to standard optical chaos, our method makes use of the chaotic voltage waveform available across the transmitter laser junction. With respect to the standard setup, the new one requires only one more electrical amplifier and a passive adder at the transmitter, while the receiver remains unchanged. It has been found that with this new scheme, synchronization quality is significantly improved for the twin lasers, while this is not the case for an unmatched laser pair. This results in an increased bit error rate differential between the authorized user and an eavesdropper, thus enhancing privacy. Simulations have been performed with the Lang-Kobayashi model.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:49 ,  Issue: 11 )

Date of Publication:

Nov. 2013

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