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Model extraction increasingly attracts research attentions as keeping commercial AI models private can retain a competitive advantage. In some scenarios, AI models are trained proprietarily, where neither pre-trained models nor sufficient…

Machine Learning · Computer Science 2021-04-14 Xinyi Zhang , Chengfang Fang , Jie Shi

Machine Learning as a Service (MLaaS) APIs provide ready-to-use and high-utility encoders that generate vector representations for given inputs. Since these encoders are very costly to train, they become lucrative targets for model stealing…

Machine Learning · Computer Science 2023-11-06 Jan Dubiński , Stanisław Pawlak , Franziska Boenisch , Tomasz Trzciński , Adam Dziedzic

Machine Learning (ML) already has been integrated into all kinds of systems, helping developers to solve problems with even higher accuracy than human beings. However, when integrating ML models into a system, developers may accidentally…

Cryptography and Security · Computer Science 2019-08-07 Mingtian Tan , Zhe Zhou

With an increase in low-cost machine learning APIs, advanced machine learning models may be trained on private datasets and monetized by providing them as a service. However, privacy researchers have demonstrated that these models may leak…

A key component of generating text from modern language models (LM) is the selection and tuning of decoding algorithms. These algorithms determine how to generate text from the internal probability distribution generated by the LM. The…

Machine Learning · Computer Science 2023-12-05 Ali Naseh , Kalpesh Krishna , Mohit Iyyer , Amir Houmansadr

We study a fundamental challenge in the economics of innovation: an inventor must reveal details of a new idea to secure compensation or funding, yet such disclosure risks expropriation. We present a model in which a seller (inventor) and…

Theoretical Economics · Economics 2025-02-13 Matthew Stephenson , Andrew Miller , Xyn Sun , Bhargav Annem , Rohan Parikh

Practitioners commonly download pretrained machine learning models from open repositories and finetune them to fit specific applications. We show that this practice introduces a new risk of privacy backdoors. By tampering with a pretrained…

Cryptography and Security · Computer Science 2024-04-02 Shanglun Feng , Florian Tramèr

Deep research systems represent an emerging class of agentic information retrieval methods that generate comprehensive and well-supported reports to complex queries. However, most existing frameworks rely on dynamic commercial search APIs,…

Deep reinforcement learning policies, which are integral to modern control systems, represent valuable intellectual property. The development of these policies demands considerable resources, such as domain expertise, simulation fidelity,…

Cryptography and Security · Computer Science 2024-05-14 Zhixiong Zhuang , Maria-Irina Nicolae , Mario Fritz

Modern machine learning (ML) models are expensive IP and business competitiveness often depends on keeping this IP confidential. This in turn restricts how these models are deployed; for example, it is unclear how to deploy a model…

Cryptography and Security · Computer Science 2025-03-11 Eleanor Clifford , Adhithya Saravanan , Harry Langford , Cheng Zhang , Yiren Zhao , Robert Mullins , Ilia Shumailov , Jamie Hayes

Global financial crime activity is driving demand for machine learning solutions in fraud prevention. However, prevention systems are commonly serviced to financial institutions in isolation, and few provisions exist for data sharing due to…

Cryptography and Security · Computer Science 2024-01-08 Iker Perez , Jason Wong , Piotr Skalski , Stuart Burrell , Richard Mortier , Derek McAuley , David Sutton

We study the task of replicating the functionality of black-box neural models, for which we only know the output class probabilities provided for a set of input images. We assume back-propagation through the black-box model is not possible…

Computer Vision and Pattern Recognition · Computer Science 2020-10-22 Antonio Barbalau , Adrian Cosma , Radu Tudor Ionescu , Marius Popescu

Machine Learning (ML) models are increasingly deployed in the wild to perform a wide range of tasks. In this work, we ask to what extent can an adversary steal functionality of such "victim" models based solely on blackbox interactions:…

Computer Vision and Pattern Recognition · Computer Science 2018-12-10 Tribhuvanesh Orekondy , Bernt Schiele , Mario Fritz

The development of privacy-preserving automatic speaker verification systems has been the focus of a number of studies with the intent of allowing users to authenticate themselves without risking the privacy of their voice. However, current…

Audio and Speech Processing · Electrical Eng. & Systems 2022-10-28 Francisco Teixeira , Alberto Abad , Bhiksha Raj , Isabel Trancoso

The field of artificial intelligence (AI) has experienced remarkable progress in recent years, driven by the widespread adoption of open-source machine learning models in both research and industry. Considering the resource-intensive nature…

Machine Learning · Computer Science 2023-08-21 Dominik Hintersdorf , Lukas Struppek , Kristian Kersting

The proliferation of large AI models trained on uncurated, often sensitive web-scraped data has raised significant privacy concerns. One of the concerns is that adversaries can extract information about the training data using privacy…

Machine Learning · Computer Science 2024-07-24 Dominik Hintersdorf , Lukas Struppek , Daniel Neider , Kristian Kersting

The recent proliferation of photorealistic images created by generative models has sparked both excitement and concern, as these images are increasingly indistinguishable from real ones to the human eye. While offering new creative and…

Machine Learning · Computer Science 2025-08-26 Haoyue Bai , Yiyou Sun , Wei Cheng , Haifeng Chen

Self-supervised models are increasingly prevalent in machine learning (ML) since they reduce the need for expensively labeled data. Because of their versatility in downstream applications, they are increasingly used as a service exposed via…

AI systems are rapidly advancing in capability, and frontier model developers broadly acknowledge the need for safeguards against serious misuse. However, this paper demonstrates that fine-tuning, whether via open weights or closed…

Cryptography and Security · Computer Science 2025-09-23 Brendan Murphy , Dillon Bowen , Shahrad Mohammadzadeh , Tom Tseng , Julius Broomfield , Adam Gleave , Kellin Pelrine

Text embedding is becoming an increasingly popular AI methodology, especially among businesses, yet the potential of text embedding models to be biased is not well understood. This paper examines the degree to which a selection of popular…

Artificial Intelligence · Computer Science 2024-06-19 Vasyl Rakivnenko , Nestor Maslej , Jessica Cervi , Volodymyr Zhukov