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Genetic algorithms and mathematical programming to crack the spanish strip cipher

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IIT-13-001A.pdf (818.6Kb)
Fecha
2013-01-13
Autor
Campos Fernández, Francisco Alberto
Gascón González, Alberto
Latorre Canteli, Jesús María
Soler Fuensanta, J. Ramón
Estado
info:eu-repo/semantics/publishedVersion
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Resumen
 
 
This article describes the application of modern algorithms to crack the official encryption method of the Spanish Civil War: the Strip Cipher. It shows the differences in efficiency and effectiveness between a genetic algorithm and mathematical programming, the optimisation methods known collectively as mathematical optimisation. Unlike the genetic algorithm, the programming approach has been seen to lead to high computational costs or to non-legible plain texts, which make it impractical. To improve the search for the genetic operators used, a dictionary is applied to identify possible words in each partially decrypted text and, thus, unblock the process. Results and conclusions have been obtained by analysing the outcome of the algorithms when attacking real ciphertexts found in the General Archive of the Spanish Civil War in Spain. Both the mathematical programming and the genetic algorithm approaches have merit, but the latter has considerable practical advantages.
 
URI
https:doi.org10.108001611194.2012.660235
Genetic algorithms and mathematical programming to crack the spanish strip cipher
Tipo de Actividad
Artículos en revistas
ISSN
0161-1194
Materias/ categorías / ODS
Instituto de Investigación Tecnológica (IIT)
Palabras Clave

genetic algorithms, mathematical programming, poly-alphabetic substitution cipher, Spanish Civil War, Strip Cipher
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Repositorio de la Universidad Pontificia Comillas copyright © 2015  Desarrollado con DSpace Software
Contacto | Sugerencias