6 research outputs found
Enhancing chaos in multistability regions of Duffing map for an asymmetric image encryption algorithm
We investigate the dynamics of a two-dimensional chaotic Duffing map which
exhibits the occurrence of coexisting chaotic attractors as well as periodic
orbits with a typical set of system parameters. Such unusual behaviors in
low-dimensional maps is inadmissible especially in the applications of chaos
based cryptography. To this end, the Sine-Cosine chaotification technique is
used to propose a modified Duffing map in enhancing its chaos complexity in the
multistable regions. Based on the enhanced Duffing map, a new asymmetric image
encryption algorithm is developed with the principles of confusion and
diffusion. While in the former, hyperchaotic sequences are generated for
scrambling of plain-image pixels, the latter is accomplished by the elliptic
curves, S-box and hyperchaotic sequences. Simulation results and security
analysis reveal that the proposed encryption algorithm can effectively encrypt
and decrypt various kinds of digital images with a high-level security.Comment: 15 pages, 15 figure
Entropy in Image Analysis II
Image analysis is a fundamental task for any application where extracting information from images is required. The analysis requires highly sophisticated numerical and analytical methods, particularly for those applications in medicine, security, and other fields where the results of the processing consist of data of vital importance. This fact is evident from all the articles composing the Special Issue "Entropy in Image Analysis II", in which the authors used widely tested methods to verify their results. In the process of reading the present volume, the reader will appreciate the richness of their methods and applications, in particular for medical imaging and image security, and a remarkable cross-fertilization among the proposed research areas