Codes and Ciphers of WWII

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Codes and Ciphers of WWII
By P. C.
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Purpose for Research

• What types of codes and ciphers
• were used during WWII?

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The Terminology

• Plaintext Cipher text
• The original message The Coded message
• Key Substitution
• Changes the message Replace letters
• Codes Cipher
• Replaces with groups of Rearranges or
• letters or numbers substitutes
  letters

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The Enigma

• Why it was so difficult
• Stepping
• polyalphabetic substitution
• Random encryption

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Enigma cont

• a b c d e f g
• q w e r t y u
• Also there were abbreviations
• Who used Enigma
• The Germans

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Ciphers

• PLAINTEXT ATTACK
• KEY BCDEFGHIJKLMNOPQRSTUVWXYZA
• CIPHER TEXT BUUBDL

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Ciphers

• ATTACK
• AT TA CK
• TA AT KC
• TAATKC

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Why use codes and ciphers?

• Why // Why not
• Your enemies // It makes it more
• wont be able to // difficult for you to
• read your own // read your own
• messages // messages

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Codes

• The Alphabet
• Attack nfd Runj9
• Go toht5 Ambushq2

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Commercial and Military Enigma

• The Commercial Enigma was heavy and bulky. It
  also didnt have the reflector.
• The Military Enigma had everything and it was
  smaller and lighter

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Codes

• People use codes because they can be shortened
  and so they can be more easily pronounced.

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Ciphers

• Cypher Cipher
• A cipher is a code only more specific

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Reflection

• So in conclusion almost all types of Codes and
  Ciphers where used during WWII
• Also many different types of Codes and Ciphers
  where developed during WWII

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Bibliography

• Codes and Ciphers.World Book.2004ed.
• Enigma machine.Wikipedia, the free
  encyclopedia. http//en.wikipedia.org/wiki/Enigma_
  machine. (Retrived29 NOV. 2007.)
• Codes. Wikipedia, the free encyclopedia.
  http//en.wikipedia.org/wiki/Codes.
  (Retrived6 DEC. 2007)
• Ciphers. Wikipedia, the free encyclopedia.
  http//en.wikipedia.org/wik/Ciphes.
  (Retrived6 DEC. 2007)