Enhancement of Data Embedding Technique Using Adaptive Pixel Pair Matching for Security

This paper proposes a secure data hiding method. The main technique behind the pixel pair matching is that, more than one pixel is used or consoled for embedding a data at a time. In adaptive pixel pair matching, it will select two pixel values, and a neighbourhood set is identified. A pixel pairs from the neighbourhood is selected to replace base on the current message digit to embed. There are two data hiding methods proposed based on pixel pair matching before, they are diamond encoding and Exploiting modification direction. The maximum capacity of the is limited to the first by 1.161 p. The proposed system would offer better security than normal adaptive pixel pair matching. The encryption algorithm used to enhance security is vigenere cipher of all ASCII characters.