Chaotic cellular automata with cryptographic application

10 páginas, 4 tablas.-- Trabajo presentado a la 9th International Conference on Cellular Automata for Research and Industry celebrada en Ascoli Piceno (Italia) del 21 al 24 de Septiembre de 2010.In this paper, a method of generating cryptographic sequences based on discrete linear chaotic cellular automata is presented. The importance of the proposal is due to the fact that such cryptographic sequences are also output sequences of a nonlinear keystream generator known as Generalized Self-Shrinking Generator. Moreover, such a keystream generator is still considered secure in symmetric cryptography. Thus, it must be noticed that the linearity of the proposed chaotic model based on additive one-dimensional cellular automata might be used to mount a cryptanalytic attack against such a nonlinear generator.This work was supported in part by CDTI (Spain) and the companies INDRA, Unión Fenosa, Tecnobit, Visual Tools, Brainstorm, SAC and Technosafe under Project Cenit-HESPERIA; by Ministry of Science and Innovation and European FEDER Fund under Project TIN2008-02236/TSI.Peer reviewe