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Secure communication based on indirect coupled synchronization

Authors:
Rupak Kharel
Krishna Busawon
Zabih Ghassemlooy

Keywords: Chaotic communication systems; chaotic synchronization; Lorenz System; Chua System

Abstract:
In this paper, a secure communication system composed of four chaotic oscillators is proposed. Two of these oscillators are unidirectionally coupled and employed as transmitter and receiver. The other two oscillators are indirectly coupled and are employed as keystream generators. The novelty lies in the generation of the same chaotic keystream both in the transmitter and receiver side for encryption and decryption purposes. We show, in particular, that it is possible to synchronize the two keystream generators even though they are not directly coupled. So doing, an estimation of the keystream is obtained allowing decrypting the message. The main feature of the proposed communication scheme is that the keystream cannot be generated with the sole knowledge of the transmitted chaotic signal, hence making it very secure. The performance of the proposed communication scheme is shown via simulation using the Chua and Lorenz oscillators.

Pages: 184 to 189

Copyright: Copyright (c) IARIA, 2012

Publication date: February 29, 2012

Published in: conference

ISSN: 2308-4243

ISBN: 978-1-61208-184-7

Location: Saint Gilles, Reunion

Dates: from February 29, 2012 to March 5, 2012