Mehdi Safarpour -  Electrical Engineering Department, Zanjan University, Zanjan, Iran 
Mostafa Charmi -  Electrical Engineering Department, Zanjan University, Zanjan, Iran 

In this paper, we purpose a method for embedding secret information in video frames through dividing data between two covers and embedding by differences of the covers. So this can help to improve security. In this method two images are taken and differences of corresponded pixels between them are calculated and based on difference value, data will be embedded. These image can be two consecutive or nonconsecutive frames (based on a secret key) of an AVI video file or two different image files. Advantage of the scheme is disturbing data between covers and so it’s impossible to retrieve hidden data without both covers .The secret message can be extracted from resulted two stego‐images( or stego‐frames ). As mentioned above in AVI video frames embedding process , selected frames can be determined by a secret key so security factor may improve considerably. It is same way for a group of images. Experimental results demonstrate that the technique has imperceptible embedding and large capacity.

Steganography, Data hiding, Data embedding, AVI, PVD1