Multilayer Image Steganography based on DCT Transform and Mod16 Algorithm
Venkata Satish, R.Vijay Babu · 2012
The combination of steganography and cryptography provides privacy in communication and security to confidential information. This paper presents a multi-layer steganography based on 2DDCT and Mod16 Algorithm.2D-DCT based steganography using mask matrix is performed at level1 and initially at level2 an encryption algorithm is applied and then Mod16 algorithm is applied to obtain final stego image. The process of extracting the confidential information is the reverse process to the previously done. While maintaining the image imperceptible, the Mod16 algorithm has achieved greater embedding capacity and additional security. Experimental results demonstrate that proposed system is resistant to steganalysis methods like χ2 attack [7].