In this paper we propose a new graphic symmetrical cryptosystem in order to encrypt a colored image defined by pixels and by any number of colors. This cryptosystem is based on a reversible bidimensional cellular automaton and uses a pseudorandom bit generator. As the key of the cryptosystem is the seed of the pseudorandom bit generator, the latter has to be cryptographically secure. Moreover, the recovered image from the ciphered image has not loss of resolution and the ratio between the ciphered image and the original one, i.e., the factor expansion of the cryptosystem, is 1.
CITATION STYLE
Marañón, G. Á., Encinas, L. H., Encinas, A. H., Del Rey, Á. M., & Sánchez, G. R. (2003). Graphic cryptography with pseudorandom bit generators and cellular automata. In Lecture Notes in Artificial Intelligence (Subseries of Lecture Notes in Computer Science) (Vol. 2773 PART 1, pp. 1207–1214). Springer Verlag. https://doi.org/10.1007/978-3-540-45224-9_163
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