Dr. Rafik Hamza is a dedicated husband, father, and Associate Professor in the Department of Digital Business & Innovation at Tokyo International University, Japan. He earned his Ph.D. in Cryptography and Security from the University of Batna 2 in 2017. His career spans industry and academia, including roles as Principal Engineer at SONATRACH (Algeria), Postdoctoral Researcher at Guangzhou University (China), and Researcher at Japan’s NICT. At TIU, Dr. Hamza teaches cybersecurity, fintech, data science, and Python programming. His research focuses on privacy-preserving machine learning, applied cryptography for big data, blockchain-enabled IoT security, and post-quantum cryptography. He chaired the AMLDS 2025 conference in Tokyo, overseeing submissions, logistics, keynotes, and awards. Dr. Hamza serves as Associate Editor for the Cureus Journal of Computer Science and reviews for top journals including IEEE Transactions, Information Sciences, and Computers & Security. He has published in leading journals such as IEEE Transactions on Industrial Informatics and Information Sciences and was ranked among the top 2% of scientists worldwide in ICT for 2021–2022.