Image encryption and authentication by orthonormal transform with CRC

Authors:
Badugu Suresh;Girija Shankar Rath
Affiliations:
MITS Engineering College, Rayagada, Odisha, India;National Institute of Technology, Rourkela Rourkela, Odisha, India
Venue:
Proceedings of the 2011 International Conference on Communication, Computing & Security
Year:
2011

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Abstract

This paper presents a novel approach for image Encryption Different type of modular Orthonormal Transforms has been used. Although Hadamard Transform, Walsh Transform were used for image compression, nobody has used so far modular Transform for image encryption. A set of discrete modular Orthonormal transforms has been generated and used for encryption image. A novel approach of image authentication by introducing a known bit pattern (signature) into the encrypted image also studied. A 4 bit Cyclic Redundancy Check (CRC) code is introduced to detected the bit position signature as an error bits subsequently CRC code are inserted column wise to detect and correct single bit errors that occur during transmission of image. The MSE, PSNR and correlation coefficient of detected image for discrete Orthonormal transforms have been obtained by simulation. The results shows good future prospect.