Ki-Hwan Kim, Su-Hyun Kim and Im-Yeong Lee 2025. A STUDY ON SECURE PRIVATE SET UNION SCHEME IN IOT ENVIRONMENT: Received: 10th June 2025, Revised: 20th June 2025, 10th July 2025, Accepted: 2nd September 2025, Date of Publication: 19th September 2025. MATTER: International Journal of Science and Technology. 11, (Sep. 2025), 43–54. DOI:https://doi.org/10.20319/mijst.2025.11.4354.