For the 50th Thai Quantum S&T Anniversary (#ThaiYQ2025) with #IYQ2025, an online monthly talk for May 2025 will be organized on the International Day of Light (IDL2025), May 16. “Progresses on security and attacking of quantum key distribution” by Zhen-Qiang Yin, Key Lab of Quantum Information, University of Science and Technology of China (USTC), will be given, showing the latest progress with a new quantum key distribution model and its applications. This talk is under a long-term collaboration between the Thai quantum information (Q-Thai.Org) forum of the IEEE Thailand section and USTC.