NARN-YIH LEE (Member, IEEE) received the Ph.D. degree in information engineering from National Cheng Kung University, Taiwan, in 1996.  He is currently a Professor with the Computer and Network Center, National Cheng Kung University. His research interests include cryptography, blockchain, network security, post-quantum cryptography, and chip security.

The following are some topics of our research:

• Research and Design of Post-Quantum Cryptographic Technologies:
  In recent years, quantum computing has advanced rapidly, and algorithms capable of performing integer factorization and solving discrete logarithm problems using quantum computers have already been proposed. To mitigate the threats posed by quantum computers, post-quantum cryptography has emerged accordingly. Our team, in collaboration with Professor Pei-Yin Chen, has formed a post-quantum cryptographic hardware security research group focusing on international standards published by NIST and their corresponding hardware circuit designs. We have successfully developed hardware implementations of CRYSTALS-Kyber and are currently developing circuits for CRYSTALS-Dilithium and SPHINCS+. Future work will emphasize optimization and acceleration of these designs.
• Research on Industrial Control System (ICS) Security:
  Industrial control environments were not originally network-connected, resulting in relatively low cybersecurity threats. However, with the rapid development of the Internet of Things and big data technologies, industrial control devices have become interconnected with the Internet and consequently prime targets for cyberattacks. In collaboration with a team from National Cheng Kung University, we have undertaken a Ministry of Education project to establish a talent cultivation and technology development base for critical infrastructure cybersecurity. Focusing on industrial facilities such as oil, water, and power systems, we conduct simulated attack-and-defense exercises and design instructional control boxes, forming one of the most important ICS cybersecurity simulation and validation facilities in southern Taiwan.
• Research on Various Digital Signature Schemes:
  In addition to conventional personal digital signature schemes, our research also covers various extended and transformed signature systems, including proxy signatures, undeniable signatures, fair blind signatures, and signature schemes based on two distinct mathematical hard problems. These variants have specialized and essential application scenarios in today’s highly digitalized and networked world, such as electronic cash systems, proxy-based services, and anti-piracy mechanisms.
• Research and Implementation of Vehicular Network Security:
  Vehicular networks are developing rapidly; however, security concerns remain a significant challenge for users. Our team investigates in-vehicle system security and attack techniques, enhances the security of in-vehicle CAN buses, and ensures the integrity and non-tampering of vehicular data. Critical in-vehicle data are protected using cryptographic keys and securely transmitted to cloud servers. Furthermore, blockchain technology is employed to safeguard driver behavior data for future applications in areas such as finance and insurance.
• Research on Blockchain Technologies and Applications:
  Blockchain has become one of the key technologies shaping future lifestyles and applications. During my tenure at Southern Taiwan University of Science and Technology, I established the Blockchain Technology Research Center and served as its director. Together with a group of like-minded faculty members, we have conducted extensive research and experimentation on blockchain technologies, successfully deploying them in applications including smart agriculture, vehicular networks, digital certificates, ERP systems, and cryptocurrencies, and actively contributing to the practical adoption of blockchain technologies.