High-capacity reversible data hiding in encrypted images based on pixel-value-ordering and histogram shifting
作者：
Highlights：
• Compared with previous methods that use a pixel block or dozens of pixels to carry one bit, more data bits can be embedded into each non-overlapped 2 × 2 sized block. In this way higher capaicty is achieved.
• Since only scrambling is adopted for image encryption, the pixel value order of pixels in a block is maintained and this is conducive to vacating the embedding room.
• Performance improvement is achieved under the condition of realizing real reversibility. Therefore, the proposed method is more suitable for IIoT scenarios with very high requirement on image quality.
• Separability of image decryption and data extraction. Receiver with only the decryption key can restore the cover image while receiver with only the data-hiding key can losslessly extract the hidden data.
摘要
•Compared with previous methods that use a pixel block or dozens of pixels to carry one bit, more data bits can be embedded into each non-overlapped 2 × 2 sized block. In this way higher capaicty is achieved.•Since only scrambling is adopted for image encryption, the pixel value order of pixels in a block is maintained and this is conducive to vacating the embedding room.•Performance improvement is achieved under the condition of realizing real reversibility. Therefore, the proposed method is more suitable for IIoT scenarios with very high requirement on image quality.•Separability of image decryption and data extraction. Receiver with only the decryption key can restore the cover image while receiver with only the data-hiding key can losslessly extract the hidden data.
论文关键词：IIoT,Information security,Reversible data hiding,Image encryption
论文评审过程：Received 4 December 2021, Revised 2 July 2022, Accepted 14 August 2022, Available online 22 August 2022, Version of Record 30 August 2022.
论文官网地址：https://doi.org/10.1016/j.eswa.2022.118600
