Steganography: Seeing the Unseen

Neil F. Johnson and Sushil Jajodia. Steganography: Seeing the Unseen IEEE Computer, February 1998: 26-34.
A PDF version is available (2.4MB)
This paper is an extension of the original Steganography paper.

Abstract:

Steganography is the art of hiding information in ways that prevent its detection. Though steganography is an ancient craft, the onset of computer technology has given it new life. Computer-based steganographic techniques introduce changes to digital covers to embed information foreign to the native covers. Such information may be communicated in the form of text, binary files, or provide additional information about the cover and its owner such as digital watermarks or fingerprints. This paper explains steganography, provides a brief history, describes how steganography is applied in hiding information in images, and surveys a few steganography software applications for processing images.

Keywords: Steganography, information hiding, digital image, digital watermarking