LSB based image steganography techniques renovation

This paper investigates current state-of-the-art LSB based image steganography techniques and tools. The LSB substitution of the image pixels selected sequentially or randomly is the most commonly used spatial domain technique and provides high embedding payload (Li, et al., 2011). It is substitutes secret data bits into least significant bits of cover object to generate the stego image. LSB is one of the most frequently used method because of fine concealment, high capability of hidden information and easy implementation. Changes in the value of the LSB are difficult to discern by human visual system (HVS) because the amplitude of the change is small and the stego image will look identical to the cover image. Even though it is most popular and simplest image steganographic method but susceptible to lossy compression and image manipulations such as scaling, rotation, cropping etc. Therefore, the resulting stego-image will destroy the embedded secret message. Therefore, LSB Steganography contains two techniques: Sequential Embedding and Scattered Embedding.