Computation of Infection Risk via Confidential Locational Entries: A Precedent Approach for Contact Tracing With Privacy Protection. - Junko Ami; Kunihiro Ishii; Yoshihide Sekimoto; Hiroshi Masui; Ikki Ohmukai; Yasunori Yamamoto; Takashi Okumura (IEEE Access, 2021)

Overcoming the Triple Challenges of Digital Contact Tracing in Japan. - Takashi Okumura; Junko Ami; Hiroshi Masui (GHTC, 2023)