reversible data hiding in encrypted image (RDHEI) is a powerful security technology that aims to hide data into the encryptedimage without any distortions of data extraction and image recovery. Most existing RDHEI me...
详细信息
reversible data hiding in encrypted image (RDHEI) is a powerful security technology that aims to hide data into the encryptedimage without any distortions of data extraction and image recovery. Most existing RDHEI methods using vacated room-based data embedding algorithms face challenges in improving embedding capacity and security. In this paper, we develop a novel datahiding strategy via fusion based on reservoir computing (RC) system, upon which a new RDHEI scheme is further proposed. In the proposed scheme, the original image is first encrypted by the stream cipher-based encryption algorithm using the secret keys generated by an optical chaotic system. Then, by means of the RC system, the generated encryptedimage can be fused with the secret data to produce the final masked image. Unlike the existing data embedding algorithms based on vacating rooms, the RC-based fusion strategy allows for hiding secret data comparable to the volume of the cover image into the encryptedimage so that a higher embedding capacity can be greatly afforded. Moreover, the proposed strategy involves a chaotic transformation via the reservoir of RC system during datahiding, producing a masked image that is completely different from the encryptedimage, thus the security is greatly enhanced. Experimental results show the contributions in improving the embedding capacity and security, and also demonstrate the superiority of the proposed scheme compared to some existing RDHEI methods.
reversible data hiding in encrypted images (RDHEI) has gained significant importance in the age of cloud computing and digital privacy, where securely embedding data into encrypted media without altering the original ...
详细信息
reversible data hiding in encrypted images (RDHEI) has gained significant importance in the age of cloud computing and digital privacy, where securely embedding data into encrypted media without altering the original content is essential. However, conventional RDH techniques often face challenges in encrypted domains, particularly in achieving high embedding capacity, security, and complete reversibility. Moreover, pixel value ordering (PVO)-based embedding methods do not perform well in RDHEI techniques, as the encryption process affects pixel value correlations within a block. To address these challenges, we propose an innovative RDHEI method that integrates a three-stage encryption process with a median-preserving pixel value ordering (PVO) technique to overcome the limitations of PVO when applied in RDHEI. In the proposed method, the encryption phase consists of block permutation, pixel scrambling, and difference-preserving encryption (DPE), ensuring robust image security while preserving essential pixel correlations. For data embedding, a median-preserving PVO strategy is employed, adapting to various block sizes to maximize embedding efficiency. Experimental results demonstrate significant improvements in embedding capacity while maintaining strong security across multiple imagedatabases, including USC-SIPI, BOSSBase v1.01, and BOWS-2. Comprehensive security evaluations, including complexity analysis, histogram analysis, StegExpose, the number of pixels change rate (NPCR), unified average changing intensity (UACI), and key space analysis.
Recently, reversible data hiding in encrypted images with Multiple Hiders (RDHEI-MH) has attracted the attention of researchers, as it can satisfy the requirements of multiparty embedding. In this paper, a universal f...
详细信息
Digital image steganography algorithms usually suffer from a lossy restoration of the cover content after extraction of a secret message. When a cover object and confidential information are both utilised, the reversi...
详细信息
Digital image steganography algorithms usually suffer from a lossy restoration of the cover content after extraction of a secret message. When a cover object and confidential information are both utilised, the reversible property of the cover is inevitable. With this objective, several reversibledatahiding (RDH) algorithms are available in the literature. Conversely, because both are diametrically related parameters, existing RDH algorithms focus on either a good embedding capacity (EC) or better stego-image quality. In this paper, a pixel expansion reversibledatahiding (PE-RDH) method with a high EC and good stego-image quality are proposed. The proposed PE-RDH method was based on three typical RDH schemes, namely difference expansion, histogram shifting, and pixel value ordering. The PE-RDH method has an average EC of 0.75 bpp, with an average peak signal-to-noise ratio (PSNR) of 30.89 dB. It offers 100% recovery of the original image and confidential hidden messages. To protect secret as well as cover the proposed PE-RDH is also implemented on the encryptedimage by using homomorphic encryption. The strength of the proposed method on the encryptedimage was verified based on a comparison with several existing methods, and the approach achieved better results than these methods in terms of its EC, location size and of
暂无评论