Chaos-Based Optical Communications: Encryption Versus Nonlinear Filtering

Author

Jacobo, Adrian ; Soriano, Miguel C. ; Mirasso, Claudio R. ; Colet, Pere

Author_Institution

IFISC (CSIC-UIB) Inst. de Fis. Interdisicplinar y Sist. Complejos, Campus Univ. Hies Balears, Palma de Mallorca, Spain

Volume

46

Issue

4

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

499

Lastpage

505

Abstract

Several chaos encoding schemes codify the message in such a way that the mean value of the transmitted signal (carrier with the message) is different for bits Â¿0Â¿ and Â¿1Â¿. We present a nonlinear filtering method that is able to detect very small changes in the mean value of a signal and therefore recover this kind of messages if its amplitude is larger than the chaotic fluctuations in the mean over the length of a bit. We also introduce a new codification method in which the mean value of the transmitted signal, over the length of each bit, is preserved and we show how it is able to beat the decryption scheme.

Keywords

chaotic communication; optical chaos; optical communication; chaos encoding; chaos-based optical communication; chaotic fluctuations; nonlinear filtering; transmitted signal; Amplitude modulation; Chaos; Chaotic communication; Cryptography; Encoding; Filtering; Jacobian matrices; Laser theory; Optical fiber communication; Optical filters; Chaos; dynamics; nonlinear optics; optical communications; semiconductor lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2009.2037980

Filename

5415800