High-Capacity and High-Security Data Hiding in Encrypted Image Using Image Filtering and Image Blocking

Data hiding (DH) is a crucial means to ensure the security of secret data during transmission. It embeds secret data into a carrier to prevent attackers from detecting it. Current research in data hiding focuses on enhancing the covert nature of the embedded secret data and the embedding capacity of the carrier. This article presents a high-capacity and high-security data hiding scheme in encrypted Images based on image filtering and blocking (IFIB-DHEI). Our contributions are as follows: (1) Improves the predictor used in the data hiding process to make it more accurate in predicting pixel points. (2) Using Gaussian filters for preprocessing to improve the smoothness of carrier images greatly increases the embedding capacity of carrier images. (3) Multi-data-hiders technology is used to encrypt images and secret data while transmitting marked encrypted images separately. The proposed scheme achieves an average embedding capacity of 4.49 bpp in the BOSSBase dataset and 4.48 bpp in the BOWS-2 dataset. A larger embedding capacity can be achieved by adjusting the filter parameters.