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26 April 2011 Text encryption via double-random phase-encoding
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In this paper, double-random phase-encoding based image hiding method was employed to encrypt and hide text. The ASCII codes of the secret text information was denoted as binary, and then transformed to a 2-dimensional array in the form of an image. Each element in the transformed array has a value between 0 and 255, where the highest 2 bits or the highest 4 bits were stored with the binary bits of the text information, while the lower bits were filled with binary bits. Then, the double-random phase-encoding method was used to encode the transformed array, and the encoded array was hidden into an expanded cover image to achieve text information hiding. Experimental results show that the secret text can be recovered accurately with the ratio of 100% and 99.89% by storing the binary bits of the text information to the highest 2 bits and the highest 4 bits of the transformed array, respectively. By employing the optical information processing method, the proposed method can improve the security of text information transmission, while keeping high hiding capacity.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jun Sang, Shenggui Ling, and Mohammad S. Alam "Text encryption via double-random phase-encoding", Proc. SPIE 8055, Optical Pattern Recognition XXII, 80550U (26 April 2011);

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