53 research outputs found
Reversible Data Hiding in Encrypted Text Using Paillier Cryptosystem
Reversible Data Hiding in Encrypted Domain (RDHED) is an innovative method
that can keep cover information secret and allows the data hider to insert
additional information into it. This article presents a novel data hiding
technique in an encrypted text called Reversible Data Hiding in Encrypted Text
(RDHET). Initially, the original text is converted into their ASCII values.
After that, the Paillier cryptosystem is adopted to encrypt all ASCII values of
the original text and send it to the data hider for further processing. At the
data hiding phase, the secret data are embedded into homomorphically encrypted
text using a technique that does not lose any information, i.e., the
homomorphic properties of the Paillier cryptosystem. Finally, the embedded
secret data and the original text are recovered at the receiving end without
any loss. Experimental results show that the proposed scheme is vital in the
context of encrypted text processing at cloud-based services. Moreover, the
scheme works well, especially for the embedding phase, text recovery, and
performance on different security key sizes
Framework for reversible data hiding using cost-effective encoding system for video steganography
Importances of reversible data hiding practices are always higher in contrast to any conventional data hiding schemes owing to its capability to generate distortion free cover media. Review of existing approaches on reversible data hiding approaches shows variable scheme mainly focussing on the embedding mechanism; however, such schemes could be furthermore improved using encoding scheme for optimal embedding performance. Therefore, the proposed manuscript discusses about a cost-effective scheme where a novel encoding scheme has been used with larger block sizes which reduces the dependencies over larger number of blocks. Further a gradient-based image registration technique is applied to ensure higher quality of the reconstructed signal over the decoding end. The study outcome shows that proposed data hiding technique is proven better than existing data hiding scheme with good balance between security and restored signal quality upon extraction of data
Reversible Data Hiding in Encrypted Images Using MSBs Integration and Histogram Modification
This paper presents a reversible data hiding in encrypted image that employs
based notions of the RDH in plain-image schemes including histogram
modification and prediction-error computation. In the proposed method, original
image may be encrypted by desire encryption algorithm. Most significant bit
(MSB) of encrypted pixels are integrated to vacate room for embedding data
bits. Integrated ones will be more resistant against failure of reconstruction
if they are modified for embedding data bits. At the recipient, we employ
chess-board predictor for lossless reconstruction of the original image by the
aim of prediction-error analysis. Comparing to existent RDHEI algorithms, not
only we propose a separable method to extract data bits, but also content-owner
may attain a perfect reconstruction of the original image without having data
hider key. Experimental results confirm that the proposed algorithm outperforms
state of the art ones
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