Research
Design and Applications for Cryptographic Frameworks and Platforms
Towards achieving “Security/Privacy By Design” for information systems or platforms, it is mandatory to apply cryptographic techniques that fulfill the functionality and security requirements. In particular, to deal with complex security and privacy requirements, we often require multiple advanced cryptographic tools along with their combinations. In this research, we establish …
Privacy Preserving Technologies for Data Analysis and Machine Learning
With the widespread use of IoT (Internet of Things), mobile devices, and social networks, we are facing a need for performing statistical analysis while protecting user privacy. For example, we can calculate a histogram from users’ personal data (e.g., locations, electric power consumption) to analyze popular sightseeing places or power …
Security Analysis and High-Speed Implementation of Cryptographic Primitives and Protocols
Even if the security of cryptographic and secure computation protocols is theoretically proven, it does not immediately follow that those protocols can be used with confidence. For example, in lattice-based cryptography, it is necessary to evaluate the concrete hardness of the lattice problem on which the security is based. Also, …
TEE (Trusted Execution Environment) and its supporting technologies
TEE is a new CPU’s security feature that offers another execution environment isolated from OS. TEE which is a security protected area is named as secure world, and the conventional OS runs in REE (Rich Execution Environment) named as normal world. The most popular TEEs are Intel SGX and Arm TrustZone. …
Researcher
Nuttapong Attrapadung
Nuttapong Attrapadung is currently the Research Team Leader for the Cryptography Platform Research Team at the Cyber-Physical Security Research Center (CPSEC) of the National Institute of Advanced Industrial Science and Technology (AIST). He received his Ph.D. in Information and Communication Engineering from the University of Tokyo (Japan) in 2007. His research interests are in the area of cryptography and information security (especially public-key cryptography and multi-party computation). His specialized theme is attribute-based encryption.
Kazuma Ohara
Kazuma Ohara obtained a Ph.D. degree from the University of Electro-Communications in 2019 and is currently a Senior Researcher in Cryptography Platform Research Team, National Institute of Advanced Industrial Science and Technology (AIST). He specializes in applied cryptography, in particular secure multi-party computation.
Tadanori Teruya
He received the Ph.D. degree in engineering from the University of Tsukuba in 2012. Currently, he is a senior researcher with Cryptography Platform Research Team, Cyber Physical Security Research Institute in National Institute of Advanced Industrial Science and Technology. His research interests include secure and high-speed implementation of cryptographic schemes and privacy-enhancing technologies based on cryptography. In particular, software implementation of pairing-based cryptography.
Keisuke Hara
Keisuke Hara received his Ph.D. in Science from the Tokyo Institute of Technology (Tokyo Tech) in 2022. Currently, he is a researcher in Cryptography Platform Research Team (CPRT), National Institute of Advanced Industrial Science and Technology (AIST). His research interests are in the area of cryptography and information security (especially, public-key cryptography). He specializes in anonymous authentication (e.g., ring signature).
Ryuya Hayashi
Ryuya Hayashi received his Ph.D. in Information and Communication Engineering from the University of Tokyo (Japan) in 2025 and is currently a researcher in the Secure Platform Research Group at the Cyber Physical Security Research Institute (CPSEC) of the National Institute of Advanced Industrial Science and Technology (AIST). His research interests are in the area of cryptography and information security (especially, public-key cryptography).
Takashi Yagawa
Research Assistant
Masahiro Ishii
Collaborating Visitors (Tokyo Institute of Technology)
Takanori Yasuda
Collaborating Visitors (Okayama University of Science)