noise removal operation is commonly applied as pre-processing step before subsequent image processing tasks due to the occurrence of noise during acquisition or transmission process. a common problem in imaging systems by using cmos or ccd sensors is appearance of  the salt and pepper noise. this paper presents cellular automata (ca) framework for noise removal of distorted image by the salt an...

The main goal of this paper is to study the behaviour of a particular type of hybrid cellular automata, as cryptographically secure pseudorandom bit generators. The hybrid cellular automata considered have been passed the statistical tests de…ned in the cryptographic literature to study the security of the sequences generated for cryptographic purposes: frequency test, serial test, poker test, ...

This paper presents, a simulator that aims the development and design of cellular-automata based cryptographic algorithms. This software is necessary mainly in order to choose a (large) set of local rules as possible keys that should be integrated in hardware. The software accepts linear and two-dimensional cellular automata having variable dimensions, limited to 100/100 cells (that gives a max...

In this paper, we explore the 256 elementary cellular automata rules by a Walsh transform in order to find out correlation-immune rules for generating good pseudo-random sequences. We prove that, except the 8 linear rules, there is no correlation-immune rule among the 256 rules. Thus, Wolfram cellular automata cannot be used as a cryptographic pseudo-random generator since the generated pseudo-...