Engineering Transactions, 57, 2, pp. 89–104, 2009

On improved image encryption scheme based on chaotic map lattices

K. JASTRZĘBSKI
Warsaw University of Technology Department of Electronics and Information Technology

Z. KOTULSKI
Institute of Fundamental Technological Research Polish Academy of Sciences

In this paper we examine one of the recently proposed chaotic image encryption algorithms,
based on chaotic map lattices (CML). We show certain problems with the chaotic map, as well
as errors in the designed algorithm. Then we propose a way to improve it and present a new
version of algorithm and its implementation. At the end, we show the results of a security
analysis and a comparison of both schemes. These results were obtained in the MSc Thesis.
Keywords: Discret Chaotic Cryptography (DCC), image encryption, chaotic dynamical systems
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