Role of Symmetry and Geometry in a chaotic Pseudo-Random Bit Generator

Details Role of Symmetry and Geometry in a chaotic Pseudo-Random Bit Generator Role of Symmetry and Geometry in a chaotic Pseudo-Random Bit Generator

2008-02-29

arxiv.org/abs/0802.4350v1

Nonlinear Sciences

Chaotic Dynamics

21 pages, 10 figures, 3 tables

Scientific paper

In this work, Pseudo-Random Bit Generation (PRBG) based on 2D chaotic mappings of logistic type is considered. The sequences generated with two Pseudorandom Bit Generators (PRBGs) of this type are statistically tested and the computational effectiveness of the generators is estimated. The role played by the symmetry and the geometrical properties of the underlying chaotic attractors is also explored. Considering these PRBGs valid for cryptography, the size of the available key spaces are calculated. Additionally, a novel mechanism called 'symmetry-swap' is introduced in order to enhance the PRBG algorithm. It is shown that it can increase the degrees of freedom of the key space, while maintaining the speed and performance in the PRBG.

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