The Code Of The Navajo Code Essay

The Code Of The Navajo Code Essay

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Sitting in class wanting to tell my friend about the ideas I had for after school meant passing a note to him. But what if I got caught? How would I get the message to him without anyone else knowing about the plans? It meant a secret code needed to be devised. My friends and I pondered what code we could come up with. It had to be simple enough that we wouldn’t forget it, but hard enough that no one could break the code. I believe this was the start of my love for programming.
Watching and hearing stories of codes being used such as the Navajo code talkers, and the Germans inventing Enigma left me wanting to know about the subject. We can’t forget all the great movies that were made that helped showcased encryption and deciphering. The movie — Sneakers — where the phrase “It’s Not About Who’s Got the Most Bullets, It’s About Who’s Got the Information” had me wanting to know how to gain this knowledge and/or keep it from those who shouldn’t have it.
The word cryptography comes from the Greek word kryptos, meaning hidden or secret. Cryptography is defined as the art of writing or solving codes. Encryption and decryption are processes involved with cryptography. Encryption is a conversion of data into a form that one must decrypt. These messages are secured for many different purposes which include online transactions, health records, student records, military and defense purposes, and for the transfer of classified information. When the encryption process is used there is a sense of security and confidentiality which ensures those who are authorized to view or accept the information will be the only ones to do so. Only those who should have access to the classified information will be able to decode the message by using...


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...nside that could move around based upon what shift was being used at the time.
In the Middle ages Polyalphabetic Substitution was used. Polyalphabetic Substitution uses more than one alphabet switching between them in a particular way. This has the advantage that you cannot use the same frequency analysis that you could with a monoalphabetic substitution. One of the more popular ciphers that use this process is called the Vigenere cipher. The Vigenere cipher was invented by by a Frenchman, Blaise de Vigenère in the 16th century. It would use two or more alphabets in the process usually by a word or phrase as the key. In the encryption process you would write the key repeatedly to fill the length of the message. Using the Vigenère square — a square that contains all of the Caesar Ciphers together — you will line up the key to the plain text to find the substitution.

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