A Reversible Data Hiding Method in Compressible Encrypted Images
This method addresses the problem of embedding data into encrypted images while maintaining compressibility for applications requiring secure and efficient image handling, offering an incremental improvement over existing two-domain data hiding methods.
This paper introduces a reversible data hiding (RDH) method for compressible encrypted images, enabling payload embedding and compression of encrypted images with the payload. The method achieves high performance in lossless compression efficiency using JPEG-LS and JPEG 2000, data hiding capacity, and marked image quality.
We propose a reversible data hiding (RDH) method in compressible encrypted images called the encryption-then-compression (EtC) images. The proposed method allows us to not only embed a payload in encrypted images but also compress the encrypted images containing the payload. In addition, the proposed RDH method can be applied to both plain images and encrypted ones, and the payload can be extracted flexibly in the encrypted domain or from the decrypted images. Various RDH methods have been studied in the encrypted domain, but they are not considered to be two-domain data hiding, and the resultant images cannot be compressed by using image coding standards, such as JPEG-LS and JPEG 2000. In our experiment, the proposed method shows high performance in terms of lossless compression efficiency by using JPEG-LS and JPEG 2000, data hiding capacity, and marked image quality.