Securing Information Based on Watermarking

In the age of digital technology, computer- and networking-based technologies have increased the enormous demand for multimedia data transmission through the Internet. In the context of multimedia data, images are widely shared and transferred because these provide more content, and sensitive and confidential information, which are also accompanied by several security risks. This paper presents a novel hiding approach for a triple image using a wavelet transform with a phase-truncated Fourier transform (PTFT) process. In the scheme, the involvement of wavelet transform helps to create watermarking to hide three images that also work as a pre-processing layer which are then undergone for encryption combining processes of phase truncation and phase reservation. This encryption process generates a real-value ciphertext and two decryption keys for retrieving the images. Additionally, the parameters of wavelet and pixel scrambling orders are required at the decryption stage. The effectiveness of the proposed idea for triple image hiding is assessed by determining the mean square error and the correlation coefficient for the decryption steps. The simulation experiments present higher security and robustness against unauthorized attempts.