An improved steganographic technique based on diamond encoding method

Steganography is the science of hiding information in digital media that seemingly harmless. LSB replacement technique is commonly used in hiding information. Exploiting modification direction (EMD) method is a high capacity technique. EMD method uses the relationship of η adjacent pixels to embed the secret data. This method can hide (2n + 1)-ary notational secret digit into η cover pixels. Based on this method Chao et al. proposed Data Hiding Scheme with Diamond Encoding (DEMD) method which can embed (2k2 + 2k + 1)-ary secret data in a pair of pixel. Our proposed method is extension of DEMD method. A reference matrix is required for this method on the other hand our method doesn't need this matrix and also overcome the overflow problem.