Confidentiality is probably the most common aspect of information security. We need to
protect our confidential information. An organization needs to guard against those malicious
actions that endanger the confidentiality of its information. Confidentiality not only applies
to the storage of the information, it also applies to the transmission of information. When
we send a piece of information to be stored in a remote computer or when we retrieve a
piece of information from a remote computer, we need to conceal it during transmission.