Chaotic Multiple-image Encryption and Individual-image Decryption with FPGA Implementation

A large volume of image data has been increasingly generated in every area, and it is necessary to keep confidential. Multiple image encryption is a promising solution for massive image data. Existing algorithms allow to encrypt multiple images at the same time, but it is required to decrypt all cohort ciphered images to retrieve even one or a few of images. It wastes time and resource for undesired images. In this work, for the first time, a model of MIE is proposed to overcome the mentioned drawback of existing algorithms by allowing to decrypt individual images from a cohort of encrypted images. The effectiveness of the proposed model is demonstrated by the result of exemplar simulation and its FPGA implementation for the DICOM standard.