KAIST, SMU, and NUS jointly develop “SweepLED,” an AI technology that detects hidden cameras using only a smartphone and a LED device. This paper, which includes SMU Professor of Computer Science Rajesh Balan as a collaborator, was presented on 20 June 2026 at ACM MobiSys 2026, a leading international conferences mobile computing. This technology can help users protect their privacy more easily and prevent illegal filming in everyday spaces.