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Cryptography

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Dalton Butcher

on 15 April 2011

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Transcript of Cryptography

Cryptography Dalton Butcher What is Cryptography? Cryptography is the science of the techniques of coded or ciphered writing systems or methods The Scytale What is cryptography used for? Cryptography is mainly used to keep data safe from theft and alteration The Zimmerman Telagram
A World War I encrypted telagram Additive/substitution ciphers


It is unknown as to why it is 3 units instead of 2 or 4 Nobody could decrypt the Enigma messages The Enigma The beginning of the end of the Enigma

Angry and perhaps drunk German slave allowed a French spy to take photographs of two Enigma manuals Spartans would wrap a peice of cloth/parchment with letters on the Scytale W
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. The end for the Enigma French spy took the photographs back to France The photographs of the manual were too advanced for the French Copies of the photographs were sent to Poland were a man named Marian Rejewski worked to solve the Enigma After 18 months, Rejewski solved the problem of the Enigma and Poland could intercept and decrypt German messages WWI and cryptography WWI created a great boom for cryptography WWI was the reason many new and advanced forms of cryptography were developed WWI led to the creation of the Enigma Many countries wanted to use cryptography to keep battle strategies a secret German telagram sent to the German embasy in Mexico Offered Mexico U.S. territory if Mexico joined the German cause The telagram was intercepted by two British cryptographers whose names were William Montgomery and Nigel de Gray Was invented by a German engineer named Arthur Scherbius Device that is used for encryption and decription Used by the German Army, Navy and Air Force Espionage caused the downfall of the Enigma Sources http://www.garykessler.net/library/crypto.html#intr http://www.cypher.com.au/crypto_history.htm http://www.archives.gov/education/lessons/zimmermann/ http://en.wikipedia.org/wiki/Enigma_machine One type of cryptography A letter in the plain text becomes that of the letter 3 units to the right Example: A becomes D and Q becomes T
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