Visually Meaningful Multi-image Encryption Scheme

Cipher images that are generated using encryption algorithms are noise-like image, which shows a clear indication for the presence of encrypted data. The noise-like image lures an adversary to carry out attacks. An approach for the generation of visually meaningful multiple-image encryption scheme is presented in this paper. Multiple cipher image data are embedded in the insignificant real data of a host image. Simulation results and security analyses express the high-quality performance of the proposed method. Comparison with Bao and Zhou (Inf Sci 324:197-207, 2015) and Kanso and Ghebleh (Opt Lasers Eng 90:196-208, 2017) visually meaningful image encryption schemes, the proposed scheme has got better ability to embed more images with least distortion to the visual perspective of the host image.