Methodology of Spread-Spectrum Image Steganography
Lisa M. Marvel, Charles Boncelet, Retter Jr., Tommy Charles · 1998
Abstract : This report presents a new method of digital steganography, entitled Spread-Spectrum Image Steganography (SSIS). Steganography, which means covered writing in Greek, is the science of communicating in a hidden manner. Following a brief history of this art and a discussion of steganographic communication theory, the new method, SSIS, is introduced. This system hides and recovers messages of substantial length within digital imagery while maintaining the original image size and dynamic range. The hidden messages can be recovered using appropriate keys without any knowledge of the original image. Image processing, error control coding, and spread-spectrum techniques utilized are described, and the performance of the technique is illustrated. A message embedded by this method can be in the form of text, imagery, or any other digital signal. Applications for such data-hiding scheme include in-band captioning, covert communication, image tamperproofing, authentication, embedded control, and revision tracking.