A novel chaotic approach for information hiding in image
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- Farschi, S.M.R. & Farschi, H. Nonlinear Dyn (2012) 69: 1525. doi:10.1007/s11071-012-0367-5
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Hiding information in image has been proposed as a methodology for transmitting messages through innocuous covers to conceal their existence. This work investigates current state-of-the-art methods and provides a new and efficient approach to digital image steganography. We proposed an asymmetric image steganographic method based on a chaotic dynamic system. The hidden message can be recovered using orbits different from the embedding orbits, and the original image is not required to extract the hidden message. In the real communication, the receiver can use the same system as well as retrieving the data back that has been hidden inside the image. However, a secret key is needed by the receiver in order to retrieve the data back. This secret key is generated to use the proposed algorithm during the process of hiding the data. In contrast to current method, by using the secret key to retrieve the data, it maintains privacy, confidentiality, and accuracy of the data. The experimental results on USC data base demonstrates that the proposed encryption algorithm has a low time complexity and has the advantages of large key space and high security. In addition, the discussions reveal that the proposed scheme possesses security, imperceptibility, and survivability. The results are promising and point to the advocacy and coherence of the developed algorithm.