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facts about cryptography

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Alisha Hunter

on 23 September 2014

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Transcript of facts about cryptography

facts about cryptography
The definition of cryptography is :
'the art of writing and solving codes'.
Cryptology is a fairly young science. It has been used for thousands of years to hide messages, systematic study of cryptology as a science (and perhaps an art) just started circa one hundred years ago
more fact
The first evidence of the use of cryptography (in some form) was found in a carving made around 1900 BC, in the main chamber of the tomb of the nobleman Khnumhotep II, in Egypt
even more fact
Moving forward to around 100 BC, Julius Caesar was used a form of encryption to send secret messages to his army generals posted in the war front. This substitution cipher, known as Caesar cipher, is perhaps the most mentioned historic cipher in academic literature
interesting fact
Cryptography is the art of writing or solving codes (mentioned in a later bubble). It has been around for centuries, with the earliest examples dating form the times of the ancient egyptians!
examples of cryptography
An example of cryptography could be a substitution
cipher (such as the famous one that Julius Caeser
used. This could be anything, e.g G -> A, or F -> Z, but
substitution ciphers usually just rotate the letters around, e.g moving every letter on 4 places, meaning A would become D, B would become E, etc.
The earliest form of cryptography was the simple writing of a message, as most people could not read (New World, 2007). In fact, the very word cryptography comes from the Greek words kryptos and graphein, which mean hidden and writing, respectively (Pawlan, 1998).
el facto
mr factoid
Cryptography helps us to protect against hackers. By encrypting informations, it makes it harder for the hackers to break into accounts
as they will first have to figure out
the codes.
cryptography in the war
Cryptography was essential in the war, with the main barrier being the Enigma Machine. Used by the Nazi Germans, you typed in your message, then the machine scrambled the letters in to a very confusing code, only decodable by the recieving Germans who possessed the key. The Allies spent the majority of the war trying to crack the Enigma Machine, and eventually it was cracked, and all the German secrets were figured out, significantly aiding the war effort and eventually leading to our victory.
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