Steganography

The hiding of information within a more obvious kind of communication. Although not widely used, digital steganography involves the hiding of data inside a sound or image file. Steganalysis is the process of detecting steganography by looking at variances between bit patterns and unusually large file sizes.

The art and science of communicating in a way that hides the existence of the communication. For example, a child pornography image can be hidden inside another graphic image file, audio file, or other file format.

A variety of encryption that completely hides text or graphics, usually unencrypted, within other text or graphics that are electronically transmitted.