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Linchen Yu

3 accepted papers

2025

ESF: Efficient Sensitive Fingerprinting for Black-Box Tamper Detection of Large Language Models

ACL 2025finding

The rapid adoption of large language models (LLMs) in diverse applications has intensified concerns over their security and integrity, especially in cloud environments where internal model parameters are inaccessible to users. Traditional tamper detection methods, designed for deterministic classifi…

2025

Enhancing Adversarial Transferability with Checkpoints of a Single Model's Training

CVPR 2025poster

Adversarial attacks threaten the integrity of deep neural networks (DNNs), particularly in high-stakes applications. In this paper, we present a novel black-box adversarial attack that leverages the diverse checkpoints generated during a single model's training trajectory. Unlike conventional ensemb…

2025

SDBF: Steep-Decision-Boundary Fingerprinting for Hard-Label Tampering Detection of DNN Models

CVPR 2025poster

Cloud-based AI systems offer significant benefits but also introduce vulnerabilities, making deep neural network (DNN) models susceptible to malicious tampering. This tampering may involve harmful behavior injection or resource reduction, compromising model integrity and performance. To detect model…