On the anti-synchronization detection for the generalized Lorenz system and its applications to secure encryption

0342105 - ÚTIA 2011 RIV CZ eng J - Journal Article
Lynnyk, Volodymyr - Čelikovský, Sergej
On the anti-synchronization detection for the generalized Lorenz system and its applications to secure encryption.
Kybernetika. Roč. 46, č. 1 (2010), s. 1-18. ISSN 0023-5954
R&D Projects: GA ČR(CZ) GA102/08/0186
Institutional research plan: CEZ:AV0Z10750506
Keywords : observer * nonlinear system * chaos shift keying * generalized Lorenz system * synchronization * anti-synchronization * secure communication
Subject RIV: BC - Control Systems Theory
Impact factor: 0.461, year: 2010
http://library.utia.cas.cz/separaty/2010/TR/lynnyk-0342105.pdf

In this paper, a modified version of the Chaos Shift Keying (CSK) scheme for secure encryption and decryption of data will be discussed. The classical CSK method determines the correct value of binary signal through checking which initially unsynchronized system is getting synchronized. On the contrary, the new anti-synchronization CSK (ACSK) scheme determines the wrong value of binary signal through checking which already synchronized system is loosing synchronization. The ACSK scheme is implemented and tested using the so-called /emph{generalized Lorenz system} (GLS) family making advantage of its special parametrization. Such an implementation relies on the parameter dependent synchronization of several identical copies of the GLS obtained through the observer-based design for nonlinear systems. The purpose of this paper is to study and compare two different methods for the anti-synchronization detection, including further underlying theoretical study of the GLS.
Permanent Link: http://hdl.handle.net/11104/0184929