Reducing Distortion in Steganography using Syndrome Trellis Code

Data protection is one of the most daunting issues facing the technology world today. Numerous schemes have been proposed over the last decade to protect the transmission of confidential data over the public network (Internet). Steganography, along with cryptography, can be one of the best ways to solve this problem. The word stego is the Greek word "Secret." Steganography is the process of embedding a hidden message to an image. Essentially, distortion occurs as pixel length increases, as distortion increases hackers can easily target the computer and can easily view the information contained in the image. The non-binary embedding scheme by syndrome-trellis codes is used here to reduce the distortion. The role of the Trellis Syndrome Code in steganography is to assign a scalar to any possible value of a stego element representing the distortion of an embedding shift by replacing that value with the cover element. The entire distortion is assumed to be a portion of the pre-element distortions.