A novel 3D-sudoku model for image steganography

In this paper, we propose a novel 3D-sudoku model for image steganography. Our 3D-sudoku table is constructed using a typical 9 × 9 Sudoku table. We propose a procedure to permute the elements in the 2D table. Then, different permutation versions are piled up to form a 9 × 9 × 9 3D-Sudoku table. Based on our permutation scheme, the resulting 3D-sudoku table can hide secret data with a very low PSNR value.