A Cross-Organizational Identity Proofing System for Seamless Online ID Re-Binding Leveraging Individual Number Cards

This study focuses on the issue of ID management when researchers change their organizational affiliations, aiming at the effective utilization of research data in educational and research organizations. Although research data management systems are being developed at each organization, the continuous use of research data remains an issue for researchers. For example, when a researcher moves from one organization to another, the research data that was previously available to him or her becomes unavailable. In response, there is a need for a system that allows researchers to continue using their research data smoothly even if they move from one organization to another. To solve this problem, the authors propose a cross-organizational identity proofing system that ensures the continuity of IAL2/ AAL2 and completes the ID transfer online. The idea is to use researcher ID numbers, ORCID, and public personal authentication to verify the user's identity when linking the IDs before and after the transfer. To facilitate this, the study performs identity verification using an Individual Number Card (a Japanese governmental system) to enable easy ID linkage between IdPs with high identity confirmation and authentication strength. The implementation has been carried out in the development environment of Orthros, an ID linkage service provided by the National Institute of Informatics (NIl), utilizing the API service of xID Co., which is a solution for linking with the Individual Number Card. This approach is expected to overcome ID management issues associated with researcher transfers and improve the efficiency of research data use.