@inproceedings{yang-etal-2026-challenge,
    title = "The Challenge of Identifying the Origin of Black-Box Large Language Models",
    author = "Yang, Ziqing  and
      Wu, Yixin  and
      Shen, Yun  and
      Dai, Wei  and
      Backes, Michael  and
      Zhang, Yang",
    editor = "Habernal, Ivan  and
      Ghanavati, Sepideh  and
      Haghighi, Sara  and
      Ramesh, Krithika  and
      Igamberdiev, Timour  and
      Wilson, Shomir",
    booktitle = "Proceedings of the Seventh Workshop on Privacy in Natural Language Processing",
    month = jul,
    year = "2026",
    address = "San Diego, California",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-acl-workshops/2026.privatenlp-main.2/",
    pages = "7--25",
    ISBN = "979-8-89176-397-5"
}