Sabancı University, with support from the enCRYPTON project funded by the European Union under the coordination of Erkay Savaş, successfully hosted the 6th International Workshop on Lightweight Cryptography for Security & Privacy (LightSEC 2025). The workshop took place on September 1–2, 2025 at the Conrad İstanbul Bosphorus in Beşiktaş, Istanbul, Türkiye, and was chaired by Erkay Savaş (Sabanci University), Amir Moradi (Technical University of Darmstadt) and Gregor Leander (Ruhr University Bochum).