High-capacity reversible data hiding in encrypted images based on extended run-length coding and block-based MSB plane rearrangement

In this paper, a high capacity reversible data hiding technique using a parametric binary tree labeling scheme is proposed. The proposed parametric binary tree labeling scheme is used to label a plaintext image’s pixels as two different categories, regular pixels and irregular pixels, through a symmetric or asymmetric process. Regular pixels are only utilized for secret payload embedding whereas irregular pixels are not utilized. The proposed technique efficiently exploits intra-block correlation, based on the prediction mean of the block by symmetry or asymmetry. Further, the proposed method utilizes blocks that are selected for their pixel correlation rather than exploiting all the blocks for secret payload embedding. In addition, the proposed scheme enhances the encryption performance by employing standard encryption techniques, unlike other block based reversible data hiding in encrypted images. Experimental results show that the proposed technique maximizes the embedding rate in comparison to state-of-the-art reversible data hiding in encrypted images, while preserving privacy of the original contents.

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High-Capacity Reversible Data Hiding in Encrypted Images Based on Prediction Error Compression and Block Selection

Security and Communication Networks ◽

10.1155/2021/9606116 ◽

2021 ◽

Vol 2021 ◽

pp. 1-12

Author(s):

Xu Wang ◽

Li-Yao Li ◽

Ching-Chun Chang ◽

Chih-Cheng Chen

Keyword(s):

Data Hiding ◽

Reversible Data Hiding ◽

Additional Data ◽

High Capacity ◽

Personal Data ◽

Huffman Coding ◽

Prediction Errors ◽

Original Image ◽

Block Based ◽

Encrypted Images

The popularity of cloud computing has impelled more users to upload personal data into the cloud server. The need for secure transmission and privacy protection has become a new challenge and has attracted considerable attention. In this paper, we propose a high-capacity reversible data hiding scheme in encrypted images (RDHEI) that compresses prediction errors in usable blocks of block-based encrypted images. On the content owner side, the original image is divided into 2 × 2 sized blocks, and each block is encrypted by block-based modulation. On the data hider side, an efficient block-based predictor is utilized to generate prediction errors. The Huffman coding technique is introduced to compress prediction errors in the usable blocks to embed abundant additional data. On the receiver side, the additional data can be totally extracted with a data hiding key and the original image can be losslessly recovered with an image encryption key. Experimental results demonstrate that the embedding rate of our proposed scheme is significantly improved compared to those of state-of-the-art schemes.

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High capacity reversible data hiding in encrypted images based on prediction error and block classification

Multimedia Tools and Applications ◽

10.1007/s11042-021-11143-0 ◽

2021 ◽

Author(s):

Xu Wang ◽

Chin-Chen Chang ◽

Chia-Chen Lin

Keyword(s):

Data Hiding ◽

Prediction Error ◽

Reversible Data Hiding ◽

High Capacity ◽

Block Classification ◽

Encrypted Images

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High-Capacity Reversible Data Hiding in Encrypted Images by Information Preprocessing

Complexity ◽

10.1155/2020/6989452 ◽

2020 ◽

Vol 2020 ◽

pp. 1-12

Author(s):

Xi-Yan Li ◽

Xia-Bing Zhou ◽

Qing-Lei Zhou ◽

Shi-Jing Han ◽

Zheng Liu

Keyword(s):

Data Hiding ◽

Reversible Data Hiding ◽

High Capacity ◽

Main Idea ◽

Original Image ◽

Chaos Encryption ◽

Secret Information ◽

Encrypted Image ◽

Encrypted Images ◽

Scanned Documents

With the development of cloud computing, high-capacity reversible data hiding in an encrypted image (RDHEI) has attracted increasing attention. The main idea of RDHEI is that an image owner encrypts a cover image, and then a data hider embeds secret information in the encrypted image. With the information hiding key, a receiver can extract the embedded data from the hidden image; with the encryption key, the receiver reconstructs the original image. In this paper, we can embed data in the form of random bits or scanned documents. The proposed method takes full advantage of the spatial correlation in the original images to vacate the room for embedding information before image encryption. By jointly using Sudoku and Arnold chaos encryption, the encrypted images retain the vacated room. Before the data hiding phase, the secret information is preprocessed by a halftone, quadtree, and S-BOX transformation. The experimental results prove that the proposed method not only realizes high-capacity reversible data hiding in encrypted images but also reconstructs the original image completely.

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