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Model fingerprinting has emerged as a powerful tool for model owners to identify their shared model given API access. However, to lower false discovery rate, fight fingerprint leakage, and defend against coalitions of model users attempting…

Cryptography and Security · Computer Science 2025-10-01 Anshul Nasery , Jonathan Hayase , Creston Brooks , Peiyao Sheng , Himanshu Tyagi , Pramod Viswanath , Sewoong Oh

Large language models (LLMs) face significant copyright and intellectual property challenges as the cost of training increases and model reuse becomes prevalent. While watermarking techniques have been proposed to protect model ownership,…

Cryptography and Security · Computer Science 2026-04-27 Do-hyeon Yoon , Minsoo Chun , Thomas Allen , Hans Müller , Min Wang , Rajesh Sharma

Large language models (LLMs) have distinct and consistent stylistic fingerprints, even when prompted to write in different writing styles. Detecting these fingerprints is important for many reasons, among them protecting intellectual…

Computation and Language · Computer Science 2025-03-04 Yehonatan Bitton , Elad Bitton , Shai Nisan

As large language models are increasingly deployed in sensitive environments, fingerprinting attacks pose significant privacy and security risks. We present a study of LLM fingerprinting from both offensive and defensive perspectives. Our…

Cryptography and Security · Computer Science 2025-08-13 Kevin Kurian , Ethan Holland , Sean Oesch

Model fingerprinting has emerged as a promising paradigm for claiming model ownership. However, robustness evaluations of these schemes have mostly focused on benign perturbations such as incremental fine-tuning, model merging, and…

Cryptography and Security · Computer Science 2025-10-01 Anshul Nasery , Edoardo Contente , Alkin Kaz , Pramod Viswanath , Sewoong Oh

The rapid advancement of large language models (LLMs) has revolutionized natural language processing, enabling applications in diverse domains such as healthcare, finance and education. However, the growing reliance on extensive data for…

Cryptography and Security · Computer Science 2024-12-10 Guoshenghui Zhao , Eric Song

Protecting the intellectual property of open-source Large Language Models (LLMs) is very important, because training LLMs costs extensive computational resources and data. Therefore, model owners and third parties need to identify whether a…

Computation and Language · Computer Science 2024-10-21 Jie Zhang , Dongrui Liu , Chen Qian , Linfeng Zhang , Yong Liu , Yu Qiao , Jing Shao

This paper presents a survey and taxonomy of LLM fingerprinting and watermarking for identity, ownership verification, provenance, and generated-content attribution. Large language models (LLMs) require substantial investments in data,…

Cryptography and Security · Computer Science 2026-05-29 Bing Liu , Shunping Wang , Yufan Zhu , Xinyi Yu , Jing Huang , Linkang Du , Hongbin Pei , Wei Luo

Large Language Models (LLMs) have become increasingly prevalent across various sectors, raising critical concerns about model ownership and intellectual property protection. Although backdoor-based fingerprinting has emerged as a promising…

Cryptography and Security · Computer Science 2025-08-28 Jingxuan Zhang , Zhenhua Xu , Rui Hu , Wenpeng Xing , Xuhong Zhang , Meng Han

It has been shown that finetuned transformers and other supervised detectors effectively distinguish between human and machine-generated text in some situations arXiv:2305.13242, but we find that even simple classifiers on top of n-gram and…

Computation and Language · Computer Science 2024-05-24 Hope McGovern , Rickard Stureborg , Yoshi Suhara , Dimitris Alikaniotis

Despite recent advances, Large Language Models remain vulnerable to jailbreak attacks that bypass alignment safeguards and elicit harmful outputs. While prior research has proposed various attack strategies differing in human readability…

Computation and Language · Computer Science 2025-10-28 Havva Alizadeh Noughabi , Julien Serbanescu , Fattane Zarrinkalam , Ali Dehghantanha

Despite providing superior performance, open-source large language models (LLMs) are vulnerable to abusive usage. To address this issue, recent works propose LLM fingerprinting methods to identify the specific source LLMs behind suspect…

Cryptography and Security · Computer Science 2025-05-23 Zhenzhen Ren , GuoBiao Li , Sheng Li , Zhenxing Qian , Xinpeng Zhang

Copyright protection for large language models is of critical importance, given their substantial development costs, proprietary value, and potential for misuse. Existing surveys have predominantly focused on techniques for tracing…

Cryptography and Security · Computer Science 2026-04-08 Zhenhua Xu , Xubin Yue , Zhebo Wang , Haobo Zhang , Qichen Liu , Xixiang Zhao , Jingxuan Zhang , Wenjun Zeng , Wengpeng Xing , Dezhang Kong , Changting Lin , Meng Han

Given the high cost of large language model (LLM) training from scratch, safeguarding LLM intellectual property (IP) has become increasingly crucial. As the standard paradigm for IP ownership verification, LLM fingerprinting thus plays a…

Cryptography and Security · Computer Science 2026-03-20 Zixun Xiong , Gaoyi Wu , Qingyang Yu , Mingyu Derek Ma , Lingfeng Yao , Miao Pan , Xiaojiang Du , Hao Wang

We introduce LLMmap, a first-generation fingerprinting technique targeted at LLM-integrated applications. LLMmap employs an active fingerprinting approach, sending carefully crafted queries to the application and analyzing the responses to…

Cryptography and Security · Computer Science 2025-02-12 Dario Pasquini , Evgenios M. Kornaropoulos , Giuseppe Ateniese

We investigate fingerprints in pretraining datasets for large language models (LLMs) through dataset classification experiments. Building on prior work demonstrating the existence of fingerprints or biases in popular computer vision…

Machine Learning · Computer Science 2025-12-02 Youssef Mansour , Reinhard Heckel

Large language models (LLMs) are trained through multi-stage pipelines over heterogeneous data sources, yet developers lack a principled way to pinpoint the specific data responsible for an observed behavior. This lack of observability…

Computation and Language · Computer Science 2026-03-19 Wenjie Jacky Mo , Qin Liu , Xiaofei Wen , Wenxuan Zhou , Zhe Zhao , Muhao Chen

Large Language Models (LLMs) have demonstrated remarkable capabilities, yet their deployment is frequently undermined by undesirable behaviors such as generating harmful content, factual inaccuracies, and societal biases. Diagnosing the…

Computation and Language · Computer Science 2025-10-06 Zhe Li , Wei Zhao , Yige Li , Jun Sun

Large language model (LLM) outputs arise from complex interactions among prompts, system instructions, model parameters, and architecture. We refer to specific configurations of these factors as generation conditions, each of which can bias…

Artificial Intelligence · Computer Science 2026-05-08 Amal Alnouri , Andreas Hinterreiter , Christina Humer , Furui Cheng , Marc Streit

Multimodal LLMs (MLLMs) are capable of performing complex data analysis, visual question answering, generation, and reasoning tasks. However, their ability to analyze biometric data is relatively underexplored. In this work, we investigate…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Ekta Gavas , Sudipta Banerjee , Chinmay Hegde , Nasir Memon