This also describes how the ancient Greeks sent secret messages. Slaves had the message tattooed on their scalp. They traveled to a designated receiver after their hair had grown back covering the message. Encryption is a process that allows private communication between a sender and receiver to remain private. It does this by disguising the actual communication form and its originator.
Encryption prohibits eavesdropping in electronic data exchange media.
Specifically, it is a wall preventing uninvited observers from monitoring communication between two parties. This paper discusses encryption in a broader context as it relates to electronic media such as computers, electronic files and data exchange. Encryption is in the software products we buy and it is an important component of software application programs. The key is an algorithm, a detailed mathematical procedure generating a number sequence within a specific amount of bits. The sequence allows access to the message.