Ascensión Hernández Encinas

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In this paper we propose a new graphic symmetrical cryp-tosystem in order to encrypt a colored image defined by pixels and by any number of colors. This cryptosystem is based on a reversible bidi-mensional 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(More)
Engineering students learn Mathematics solving real-life problems with the help of mathematical tools and the already acquired competencies and knowledge. Moreover, the use of realistic mathematics education method allows the integration of daily, real and realistic experiences to master Mathematics. The proposed teaching and learning method, is the way to(More)