Cryptography
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Title: Cryptography

Essay Details:

Subject: Technology
Author: Thomas M
Date: November 6, 2012
Level: University
Grade: A
Length: 7 / 1837

Essay text:

[1] Cryptographies main purpose is to hide messages and information. One of the earliest forms of cryptography was the rearranging of letters in messages. This was known as transportation ciphers. A cipher is a system in which plain text, usually the letters, are transposed or substituted according to a predetermined code. Another early form of cryptography was the substitution of letters. One cipher was named after Julius Caesar who was said to have used a 3 letter shift. This involved substituting a letter with another letter in the alphabet three positions away. Caesar used this method to communicate with his generals in wartimes...

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