A modular dynamical cryptosystem based on continuous cellular automata

This paper presents a new cryptosystem based on chaotic continuous cellular automata (CCA) to increase data protection as demonstrated by their flexibility to encrypt and decrypt information from distinct sources. Enhancements in cryptosystems are also presented including (i) the model based on a new chaotic CCA attractor, (ii) the dynamical integration of modules containing dynamical systems to have more complex sequences, and (iii) an enhancement for symmetric cryptosystems by allowing them to generate an infinite number of keys. This paper also presents a process of mixing chaotic sequences obtained from cellular automata, instead of using differential equations, as a basis to achieve higher security and high speed for the encryption and decryption processes using dynamical modular cryptosystems than other recent approaches. The complexity of the mixed sequences is measured using the variance fractal dimension trajectory to compare them with the realization of an unmixed chaotic sequence to verify that the former are more complex. This type of multiscale measure and evaluation never has been done in the past outside this research group.