Coverless Image Steganography: Review

Abstract

Many of the existing image steganographic techniques embed secret information into cover images by slightly altering their contents. These modifications have several effects, on the other hand, Stego-images distorted by these problems become vulnerable to steganalysis tools. Coverless information hiding represents a solution to this problem. Unlike traditional techniques, which alter the carrier, a coverless information hiding procedure does not change it. This paper reviews some of the recent works that have been conducted on the topic of coverless image steganography and provides an important insight into how these techniques are performed.