A Security Enhanced Robust Image Hiding Algorithm from Digital Signature

Abstract

The objective of this study is to adopt of digital signature as a stego-image into the cover image enhance the robustness of image steganography. Implementing an encryption algorithm in the spatial domain steganographic method can contribute to increasing the degree of security. The ability to create dynamic digital signature is highly related with the integrity and robustness of the image steganography. Unfortunately, there is wide variety of attacks that effect on quality of image steganography, although there are methods for data hiding but they are still very weak in resisting of attacks. Hence the benefits of this encryption algorithm are computational efficiency, digital signature with the size as small as 8 bytes and minimize bandwidth in comparison with other digital signature methods. In messages with the sizes smaller than 1600 bytes, the hashed file reduces the original file up to 8.51%.