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Secured Reversible Data Hiding In Encrypted Images Using Hyper Chaos
T M Amarunnishad, Aslam Nazeer
Pages - 423 - 433     |    Revised - 07-10-2014     |    Published - 10-11-2014
Volume - 8   Issue - 6    |    Publication Date - November / December 2014  Table of Contents
Reversible Data Hiding, Encrypted Image, Self-reversible Embedding, Digital Watermarks, Hyper Chaotic System, Peak Signal To Noise Ratio.
Recently, more and more attention is paid to reversible data hiding (RDH) in encrypted images, since it maintains the excellent property that the original cover can be losslessly recovered after embedded data is extracted while protecting the image content’s confidentiality. All previous methods embed data by reversibly vacating room from the encrypted images, which may be subject to some errors on data extraction and/or image restoration. Here a novel method is proposed by reserving room before encryption with a traditional RDH algorithm, and thus it is easy for the data hider to reversibly embed data in the encrypted image. Moreover data to be embedded is shuffled using a hyper chaotic function which is difficult to be extracted from the stego image without original key. A digital water mark is also embedded which ensures integrity of the data. The proposed method has been validated against three other available RDH schemes and it is observed that the proposed scheme outperforms these RDH schemes both in visual quality and payload. The proposed method can achieve real reversibility, that is, data extraction and image recovery are free of any error.
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Professor T M Amarunnishad
T K M College of Engineering - India
Mr. Aslam Nazeer
Research Scholar T K M College of Engineering Kollam, Kerala, India - India