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A Chaos Based Encryption Method for Monochrom Images and Text.

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Author(s): Varsha S | Avinash Kumar Jha

Journal: International Journal of Image Processing and Visual Communication
ISSN 2319-1724

Volume: 1;
Issue: 1;
Start page: 1;
Date: 2012;
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Keywords: Image encryption/decryption | Hilbert transform | Logistic Map | Rubik Cube | Mean Square Error

ABSTRACT
We propose a new method for encryption of monochrome (Black & White image ) and text documents using Hilbert transform and chaos theory with added security feature of Rubik Cube Operation. The input text or image is transformed using Hilbert transform. Random phase mask is generated using a logistic map function .The transformed image is combined with the random phase mask. The pixels of the image obtained from the combination are shifted row and column wise according to a random number sequence ,which also acts as a key .We call this as Rubik Cube Operation as it resembles the Rubik cube .The image obtained after Rubik Cube operation is the encrypted image. The image has been decrypted and the MSE and correlation coefficient between the decrypted and input image is calculated.
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