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Symmetry 2017, 9(5), 61; https://doi.org/10.3390/sym9050061

Reversible Data-Hiding Systems with Modified Fluctuation Functions and Reed-Solomon Codes for Encrypted Image Recovery

School of Electrical Engineering, University of Ulsan, Ulsan 44610, Korea
Academic Editor: Laurence T. Yang
Received: 29 March 2017 / Revised: 15 April 2017 / Accepted: 21 April 2017 / Published: 25 April 2017
(This article belongs to the Special Issue Symmetry in Secure Cyber World)
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Abstract

In this paper, reversible data-hiding (RDH) systems with modified fluctuation functions and rate-matched Reed–Solomon (RS) codes are proposed to enhance the data recovery from encrypted images. The modified fluctuation functions are used for estimating embedded codeword bits from the correlation of pixels. Instead of direct data-bit embedding, codeword bits of RS codes are embedded by a data-hider. With the help of the error-correcting capability of RS codes, the encrypted message can be recovered from the weak correlation of adjacent pixels in the image. In the experimental results, bit error rate (BER) and peak signal to noise ratio (PSNR) performances of the proposed system are better than those of referenced data-hiding systems for three images. The proposed schemes based on the modified fluctuation function or rate-matched codes can be applied to various RDH systems with better data transmission and image recovery performance. View Full-Text
Keywords: bit error rate; data-hiding; encryption; fluctuation functions; PSNR; reversible data-hiding bit error rate; data-hiding; encryption; fluctuation functions; PSNR; reversible data-hiding
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Kim, S. Reversible Data-Hiding Systems with Modified Fluctuation Functions and Reed-Solomon Codes for Encrypted Image Recovery. Symmetry 2017, 9, 61.

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