Debnath Bhattacharyya is a Professor in the Computer Science and Engineering Department, KL University, Bowrampet, Hyderabad, India. His research interests include Security Engineering, Pattern Recognition, Biometric Authentication, Multimodal Biometric Authentication, Data Mining and Image Processing. Yu-Chen Hu is a Professor in the Department of Computer Science at Tunghai University, Taichung City, Taiwan. His interests include image and signal processing, data compression, information hiding, information security, computer network, deep learning, and data engineering.