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We consider the emerging problem of identifying the presence and use of watermarking schemes in widely used, publicly hosted, closed source large language models (LLMs). We introduce a suite of baseline algorithms for identifying watermarks…

Machine Learning · Computer Science 2023-05-31 Leonard Tang , Gavin Uberti , Tom Shlomi

Recent years have witnessed the emergence of a new paradigm of building natural language processing (NLP) systems: general-purpose, pre-trained language models (LMs) are composed with simple downstream models and fine-tuned for a variety of…

Cryptography and Security · Computer Science 2021-03-12 Xinyang Zhang , Zheng Zhang , Shouling Ji , Ting Wang

We present the first in depth study on the robustness of existing watermarking techniques applied to code generated by large language models (LLMs). As LLMs increasingly contribute to software development, watermarking has emerged as a…

Cryptography and Security · Computer Science 2025-08-21 Tarun Suresh , Shubham Ugare , Gagandeep Singh , Sasa Misailovic

Backdoor (trojan) attacks embed hidden, controllable behaviors into machine-learning models so that models behave normally on benign inputs but produce attacker-chosen outputs when a trigger is present. This survey reviews the rapidly…

Cryptography and Security · Computer Science 2025-09-10 Bilal Hussain Abbasi , Yanjun Zhang , Leo Zhang , Shang Gao

With the rapid proliferation and increased sophistication of malicious software (malware), detection methods no longer rely only on manually generated signatures but have also incorporated more general approaches like machine learning…

Machine Learning · Computer Science 2020-01-24 Felipe N. Ducau , Ethan M. Rudd , Tad M. Heppner , Alex Long , Konstantin Berlin

Large language models (large LMs) are increasingly trained on massive codebases and used to generate code. However, LMs lack awareness of security and are found to frequently produce unsafe code. This work studies the security of LMs along…

Cryptography and Security · Computer Science 2024-08-19 Jingxuan He , Martin Vechev

Wild images on the web are vulnerable to backdoor (also called trojan) poisoning, causing machine learning models learned on these images to be injected with backdoors. Most previous attacks assumed that the wild images are labeled. In…

Computers and Society · Computer Science 2023-01-03 Le Feng , Zhenxing Qian , Sheng Li , Xinpeng Zhang

Machine learning and deep learning models are potential vectors for various attack scenarios. For example, previous research has shown that malware can be hidden in deep learning models. Hiding information in a learning model can be viewed…

Machine Learning · Computer Science 2023-08-31 Rishit Agrawal , Kelvin Jou , Tanush Obili , Daksh Parikh , Samarth Prajapati , Yash Seth , Charan Sridhar , Nathan Zhang , Mark Stamp

Malware family classification remains a challenging task in automated malware analysis, particularly in real-world settings characterized by obfuscation, packing, and rapidly evolving threats. Existing machine learning and deep learning…

Cryptography and Security · Computer Science 2026-04-06 Samita Bai , Hamed Jelodar , Tochukwu Emmanuel Nwankwo , Parisa Hamedi , Mohammad Meymani , Roozbeh Razavi-Far , Ali A. Ghorbani

The parallel evolution of Large Language Models (LLMs) with advanced code-understanding capabilities and the increasing sophistication of malware presents a new frontier for cybersecurity research. This paper evaluates the efficacy of…

Cryptography and Security · Computer Science 2026-01-15 Aniesh Chawla , Udbhav Prasad

As software becomes increasingly complex and prone to vulnerabilities, automated vulnerability detection is critically important, yet challenging. Given the significant successes of large language models (LLMs) in various tasks, there is…

Artificial Intelligence · Computer Science 2023-12-25 Zeyu Gao , Hao Wang , Yuchen Zhou , Wenyu Zhu , Chao Zhang

Large foundation models are fundamentally transforming the software engineering landscape, demonstrating exceptional capabilities across diverse tasks such as code generation, debugging, and testing. Despite this rapid progress, a…

Software Engineering · Computer Science 2025-10-21 Shuzheng Gao , Eric John Li , Man Ho Lam , Jingyu Xiao , Yuxuan Wan , Chaozheng Wang , Ng Man Tik , Michael R. Lyu

A trojan backdoor is a hidden pattern typically implanted in a deep neural network. It could be activated and thus forces that infected model behaving abnormally only when an input data sample with a particular trigger present is fed to…

Cryptography and Security · Computer Science 2019-08-12 Wenbo Guo , Lun Wang , Xinyu Xing , Min Du , Dawn Song

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

Self-supervised learning (SSL) is a prevalent approach for encoding data representations. Using a pre-trained SSL image encoder and subsequently training a downstream classifier, impressive performance can be achieved on various tasks with…

Cryptography and Security · Computer Science 2024-07-18 Mengxin Zheng , Jiaqi Xue , Zihao Wang , Xun Chen , Qian Lou , Lei Jiang , Xiaofeng Wang

Source code clones pose risks ranging from intellectual property violations to unintended vulnerabilities. Effective and efficient scalable clone detection, especially for diverged clones, remains challenging. Large language models (LLMs)…

Software Engineering · Computer Science 2025-10-20 Muslim Chochlov , Gul Aftab Ahmed , James Vincent Patten , Yuanhua Han , Guoxian Lu , David Gregg , Jim Buckley

Adversarial attacks on deep learning-based models pose a significant threat to the current AI infrastructure. Among them, Trojan attacks are the hardest to defend against. In this paper, we first introduce a variation of the Badnet kind of…

Computer Vision and Pattern Recognition · Computer Science 2022-07-11 Haripriya Harikumar , Santu Rana , Kien Do , Sunil Gupta , Wei Zong , Willy Susilo , Svetha Venkastesh

Deep Neural Networks are vulnerable to Trojan (or backdoor) attacks. Reverse-engineering methods can reconstruct the trigger and thus identify affected models. Existing reverse-engineering methods only consider input space constraints,…

Cryptography and Security · Computer Science 2022-10-28 Zhenting Wang , Kai Mei , Hailun Ding , Juan Zhai , Shiqing Ma

Large Language Models (LLMs) offer powerful capabilities in text generation and are increasingly adopted across a wide range of domains. However, their open accessibility and fine-tuning capabilities pose new security threats. This advance…

As Large Language Models (LLMs) become integral software components in modern applications, unauthorized model derivations through fine-tuning, merging, and redistribution have emerged as critical software engineering challenges. Unlike…

Machine Learning · Computer Science 2025-07-04 Zehao Wu , Yanjie Zhao , Haoyu Wang