- noun the practice of placing secret messages in computerised graphics and music files. These messages are so small that they can only be detected by special software.
- The utilization of unused data or locations within a file or data to hide additional information, such as concealed messages. A message hidden in this manner may or may not be encrypted, with its key security feature being its undetectability. For instance, steganography may use redundant bits within a given file format, such as that of an image, to embed the data in an imperceptible manner. When utilized to hold bit patterns which identify the sources of digital intellectual property, such as voice, video, or data, known as watermark.