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Sensors 2012, 12(10), 13441-13457; doi:10.3390/s121013441

Efficient Text Encryption and Hiding with Double-Random Phase-Encoding

1,* , 1
1 School of Software Engineering, Chongqing University, Chongqing 401331, China 2 Department of Electrical and Computer Engineering, University of South Alabama, Mobile, AL 36688, USA
* Author to whom correspondence should be addressed.
Received: 28 August 2012 / Revised: 19 September 2012 / Accepted: 26 September 2012 / Published: 1 October 2012
(This article belongs to the Section Physical Sensors)
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In this paper, a double-random phase-encoding technique-based text encryption and hiding method is proposed. First, the secret text is transformed into a 2-dimensional array and the higher bits of the elements in the transformed array are used to store the bit stream of the secret text, while the lower bits are filled with specific values. Then, the transformed array is encoded with double-random phase-encoding technique. Finally, the encoded array is superimposed on an expanded host image to obtain the image embedded with hidden data. The performance of the proposed technique, including the hiding capacity, the recovery accuracy of the secret text, and the quality of the image embedded with hidden data, is tested via analytical modeling and test data stream. Experimental results show that the secret text can be recovered either accurately or almost accurately, while maintaining the quality of the host image embedded with hidden data by properly selecting the method of transforming the secret text into an array and the superimposition coefficient. By using optical information processing techniques, the proposed method has been found to significantly improve the security of text information transmission, while ensuring hiding capacity at a prescribed level.
Keywords: double-random phase-encoding; text encryption; information hiding; hiding capacity; recovery accuracy double-random phase-encoding; text encryption; information hiding; hiding capacity; recovery accuracy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Sang, J.; Ling, S.; Alam, M.S. Efficient Text Encryption and Hiding with Double-Random Phase-Encoding. Sensors 2012, 12, 13441-13457.

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