A
B
C
D
E
100

code

Word or phrase replaced with a different word or phrase to keep the original word a secret!

100

cipher 

a special type of code

100

cryptography

branch of engineering which relies entirely on mathematics to keep messages a secret. 

100

encryption 

process of encoding or creating the cipher 

100

decryption 

converting or transforming the cipher to the original word or code

200

substitution cipher 

also known as the Caesar cipher

200

plaintext

the original message 

200

shift key

pre-selected number of positions farther along in the alphabet

example: shift key 3

A would equal D

A B C D

200

brute force 

known by codebreakers as trial and error

The Caesar Cipher was and is easy to decode by patterns using frequency distribution. 

200

statistics

is a branch of applied mathematics dealing with data collection, organization, analysis, interpretation and presentation.

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