R. Vijayaraghavan ¹, S. Sathya ¹, N. R. Raajan ¹

Affiliations
1 Department of Electronics & Communication Engineering, School of Electrical & Electronics Communication, SASTRA University, Thanjavur, Tamil Nadu- 613401, IN

Abstract

Image encryption plays a major role in information security. It is mainly used to convert the original image into another form. In this work, we propose a bit plane slicing of digital image to provide the more security. The main aim of BPS is used to divide the digital image into 8 bit planes. The bit plane is further rotated in order to provide better encrypted image and to make hacking more difficult. It focuses on two techniques such as bit plane slicing and image rotation for efficient image encryption. The classification of bit plane is used for analyzing the importance played by each bit of an image. It is used to estimate the each pixel of an image. The proposed technique involves rotation of bit planes is employed to make highly secure image encryption. By this method scrambling of an image is based on efficient technique even it is intercepted, the information cannot be understood. It is mainly useful for image compression because it exhibits high coding efficiency. This method which makes the decryption of an image more difficult compared to other techniques.

Keywords

Bit Plane Slicing, Image Encryption, Rotation, Scrambling

Full Text

   

R. Vijayaraghavan ¹, S. Sathya ¹, N. R. Raajan ¹

Affiliations
1 Department of Electronics and Communication Engineering, School of Electrical and Electronics Communication, SASTRA University, Thanjavur - 613401, Tamil Nadu, IN

Abstract

Image encryption is used to protect the data of an image in the most secure way. In this paper, we perform encryption and decryption of the three color planes based on gray code effect and fast Fourier transform. Gray level codes indicate that occurrence of one bit changes from a previous state of current. This process allows the system to detect the error when more than one bit changes occur. It is more efficient than binary bit plane decomposition. The Fourier transform is mainly used to represent the frequency characteristic of a spatial domain image. The color plane scrambling process is done by combining three individual encrypted planes into one composite image. This method which is applicable for any type of image formats as bmp, JPEG, GIF. This paper gives a simple way to scramble the image in unpredictable way. It provides more security than other encryption algorithm. The original images can be retrieved using a correct security key which achieves better results than the other existing methods. By exploiting gray code and Fourier transforms it increases the difficulty of decoding.

Keywords

Bit Plane Decomposition, Color Plane Scrambling, Fast Fourier Transform, Gray Code, Image Encryption

Full Text