DEMO: Radio Unit Activity Fingerprinting through Electromagnetic Side-Channel Analysis in O-RAN Networks. - Sreenithya Somavarapu; Harshita Chaudhari; Nour El Houda Aidlaid; Nongnapat Adchariyavivit; Qais Dib; Moinul Hossain; Vijay K. Shah; Md Tanvir Arafin (WISEC, 2025)