Cryptography

Cryptography is the art of changing a message in a manner that makes it readable only to the intended receiver. Cryptography is composed of two arts: encoding or enciphering is the act of taking plain text and converting it to secret text. The intended receiver of the message is given a key that allows him or her to convert coded messages to plain text. Decoding or deciphering is the act of attempting to break the secret codes and uncover the original message.

There are two forms of encoding a message: substitution, which occurs...

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