Combined Algorithm of Steganography with Matrix Pattern and Pixel Value Difference

Information hiding that different from encryption algorithm which needs to be encrypted and decrypted by complex mathematical models hides secret information in ordinary cover image and transmits it in open transmission channel in a way that is imperceptible to human eyes. LSB (least significant bit) algorithm is commonly used for information hiding, but it does not have good anti-detection ability. In this paper, a steganography combination of PVD (pixel value difference) with MP (matrix pattern) based on the difference of pixel texture is proposed, where the former is classified two portions and then the binary message is embedded in the edge portion of the blue layer of the image without original image in extracting, the latter algorithm generates matrix patterns representing 95 characters in the green layer of the cover image, and then revises the gray value of the pixels in the blue layer of the cover image. The 4
^th
- 6
^th
bits of the blue layer are used for MP algorithm, and the rest are used for PVD algorithm. The result had been proved that it has diverse embedded message forms, better detection resistance and high security capacity.