Kryptologie by Albrecht Beutelspacher - Bookswagon
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Kryptologie

Kryptologie


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About the Book

Aut prodesse volunt aut delectare poetae aut simul et iucunda et idonea dicere vitae. (Horaz) Seit es mit Sprache begabte Lebewesen gibt, gibt es auch vertrauliche Mit- teilungen, also Mitteilungen, die nur für eine einzige Person oder nur für einen ganz bestimmten Personenkreis gedacht sind, und von denen Außen- stehende keine Kenntnis erhalten sollen. Wie kann eine Nachricht 'sicher' übermittelt werden, also so, daß kein Unbefugter Kenntnis vom Inhalt dieser Nachricht erhält? Eine damit zu- sammenhängende, fast noch wichtigere Frage ist die folgende: Wie kann man erreichen, daß die Nachricht wirklich beim Empfänger ankommt, und zwar genauso, wie man sie losgeschickt hat? Traditionell gibt es zwei Möglichkeiten, diese Probleme zu lösen. Ein- mal kann man die Existenz der Nachricht verheimlichen. Man könnte die vertrauliche Nachricht zum Beispiel mit unsichtbarer Tinte schreiben. Man kann aber auch die Mitteilung durch eine vertrauenswürdige Person übermitteln lassen. Dies haben zu allen Zeiten heimlich Verliebte versucht - und fast alle klassischen Tragödien zeugen vom letztlichen Scheitern dieser Bemühungen. Eine ganz andersartige Methode besteht darin, vertrauliche Nachrich- ten zu verschlüsseln. In diesem Fall verheimlicht man nicht ihre Existenz. Im Gegenteil: Man übermittelt die Nachricht über einen unsicheren Ka- nal, aber so "chiffriert", daß niemand - außer dem wirklichen Empfänger - die Nachricht "dechiffrieren" kann. Dies ist eine ganz perfide Heraus- forderung des Gegners; solche Herausforderungen wurden in der Regel auch angenommen - und nicht selten wurde der Spieß umgedreht.


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Product Details
  • ISBN-13: 9783528189907
  • Publisher: Vieweg+teubner Verlag
  • Publisher Imprint: Vieweg+teubner Verlag
  • Edition: 2. Aufl. 1991
  • Language: German
  • Returnable: N
  • Spine Width: 10 mm
  • Weight: 286 gr
  • ISBN-10: 3528189908
  • Publisher Date: 01 Jan 1991
  • Binding: Paperback
  • Height: 210 mm
  • No of Pages: 179
  • Series Title: German
  • Sub Title: Eine Einführung in Die Wissenschaft Vom Verschlüsseln, Verbergen Und Verheimlichen. Ohne Alle Geheimniskrämerei, Aber Nicht Ohne Hinterlistigen Scha
  • Width: 148 mm


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