As it was alluded to earlier, one of the main purposes of cryptography is to scramble forms of content and images into an undecipherable state. You may be wondering how this is all exactly done. The answer is that it primarily involves the use of a key. Traditionally, this is a private key. With this particular key, the sending party can encrypt the plaintext, and from there the content or image will be sent in its garbled state across the network medium to the receiving party. A private key is private to the sender or the receiver, while a public key may be available to a group.