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Polyalphabetic Encryption: Families of Alphabets

  • Friedrich L. Bauer

Abstract

Monoalphabetic encryption uses some encryption step (possibly a polygraphs one) over and over. All the encryption steps treated in Chapters 3–6 can be used monoalphabetically—this was tacitly assumed in the examples. Genuine polyalphabetic encryption requires that the set M of available encryption steps has at least two elements, i.e., that the cryptoSystem M has at least the cardinality θ = 2. For the frequent case θ = N , where N = |V|, the French literature speaks of a chiffre carré.

Keywords

Cyclic Permutation Cycle Decomposition Additional Rotor Rotor Encryption Encryption Step 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 2.
    Marquis Gaëtan Henri Läon de Viaris, 1847–1901, French cryptologist. De Viaris invented in about 1885 one of the first printing cipher machines—according to Kahn, the very first were invented presumably before 1874 by Émile Vinay and Joseph Gaussin.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Friedrich L. Bauer
    • 1
  1. 1.Department of Computer ScienceMunich Institute of TechnologyMunichGermany

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