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Cifra: métodos manuales by Eugenio Garcés Bonet

Cifra: métodos manuales

by Eugenio Garcés Bonet
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Book cover type: Paperback
  • ISBN13: 9781471765278
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Lulu.com
  • Publisher Imprint: Lulu.com
  • Publication Date:
  • Pages: 254
  • Original Price: USD 18.94
  • Language: Spanish
  • Edition: N/A
  • Item Weight: 336 grams
  • BISAC Subject(s): Telecommunications

Desde hace milenios se ha sentido la necesidad de la comunicación secreta, decir algo a otro sin que los demás se enteren. Oral, escrita o modernamente digital, sea de la forma que sea esa comunicación segura requiere un acuerdo previo entre los corresponsales y un canal de transmisión. En este trabajo nos vamos a centrar en las formas que se han ideado para que un texto pueda ser enviado por un corresponsal a otro de forma que un tercero, aun habiendo interceptado el mensaje, no pueda tener acceso a la información que contiene. En ámbitos militares y diplomáticos esto se está haciendo desde el principio de la escritura, y modernamente se ha incorporado a esta necesidad de seguridad los entornos económicos y empresariales. Se ha incorporado primero la electricidad, luego la electrónica y por último la informática para conseguir unos sistemas en teoría inviolables, pero no todas las comunicaciones necesitan esa seguridad, o simplemente no pueden permitírsela. Los primeros métodos que se emplearon se limitaban a transformar un texto claro en otro, escrito con los mismos medios y sobre los mismos soportes que el inicial; poco a poco se incorporaron sistemas para agilizar la transformación de los textos, y en este punto es donde nos centraremos, en los medios que se usaban antes de la incorporación de la electricidad a los equipos de cifra, e incluso un punto antes, cuando las herramientas de cifra se podían hacer simplemente con papel, lápiz y tijeras.

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