An e-mail signature protocol for anti-spam work-in-progress. - Kai-Jie Chang; Chin-Chen Chang 001 (Infoscale, 2007)

Roaming across wireless local area networks using SIM-based authentication protocol. - Hao-Chuan Tsai; Chin-Chen Chang 001; Kai-Jie Chang (Comput. Stand. Interfaces, 2009)

An Efficient and Flexible Mobile Payment Protocol. - Chin-Chen Chang 001; Jen-Ho Yang; Kai-Jie Chang (ICGEC, 2012)

Flying Watchdog: A Drone with Edge AIoT for Residential Safety and Fall Detection by Face and Posture Recognition. - Kai-Jie Chang; Chung-Wei Chuang; Jun-Tung Chiu; Jen-Yeu Chen (APWCS, 2022)