Photonic Layer Security Transmission of 100 Gbit/sec Over 200 km of Populated Legacy WDM Network. - Ido Attia; Gil Alín; Hamutal Shalom; Ohad Balasiano; Anna Chiado Piat; Roberto Mercinelli; Emilio Riccardi; Maurizio Valvo; Eyal Wohlgemuth; Annachiara Pagano; Dan Sadot (ONDM, 2025)