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SHAH : Hash Function Based on Irregularly Decimated Chaotic Map

Todorova M., Stoyanov B., Szczypiorski K., Kordov K.

International Journal of Electronics and Telecommunications

2018

Vol. 64, No. 4

457--465

We present a new hash function based on irregularly decimated chaotic map, in this article. The hash algorithm called SHAH is based on two Tinkerbell maps filtered with irregular decimation rule. We evaluated the novel function using distribution analysis, sensitivity analysis, static analysis of diffusion, static analysis of confusion, and collision analysis. The experimental data show that SHAH satisfied valuable level of computer security.

Least Significant Bit Steganography using Hitzl-Zele Chaotic Map

Kordov K., Stoyanov B.

International Journal of Electronics and Telecommunications

2017

Vol. 63, No. 4

417--422

We propose a novel least significant bit steganography algorithm based on a Hitzl-Zele chaotic function. On the first step a pseudorandom generator is constructed for chaotic pixel selection for hiding the secret message. Exact study has been provided on the novel scheme using visual inspection, peak signal-to-noise ratio, and histogram analysis. The experimental data show excellent performance of the novel stego technique.