Indian Journal of Science and Technology
Year: 2015, Volume: 8, Issue: Supplementary 7, Pages: 1-8
B. Srinivasan1* , S. Arunkumar2 and K. Rajesh2
1 Department of Information Technology, School of Computing, SASTRA University, India; [email protected]
2 Department of Computer Science and Engineering, School of Computing, SASTRA University, India; [email protected], [email protected]
In this paper, we present a new approach for concealing secret message in a digital image by adding three layer securities. In the first layer, the secret image is encrypted by using the famed AES algorithm. In the second layer, we establish a Non-Uniform Block Adaptive Segmentation on Image (NUBASI) algorithm for generating segments of the cover image. This algorithm accept a Key from sender and by using this key, split the cover image into small pieces each with different dimension. In the third layer, a new randomized secret sharing algorithm hide the secret data into the different segments. This algorithm defines 32 different patterns for selecting the segments order to implant the cipher data. This proposed method was implemented and tested for various size cover images and secret messages. The quality ofthe final stego-image and original image are compared and analyzed through their PSNR values.
Keywords: Cryptography, Image Segmentation, Non-Uniform Block, Randomized Algorithm, Steganography
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