← Search

Siyuan Cheng

31 accepted papers

2026

From Poisoned to Aware: Fostering Backdoor Self-Awareness in LLMs

ICML 2026spotlight

Backdoor attacks can introduce deceptive behaviors into large language models, causing them to execute prohibited actions only when specific secret triggers appear in the input. Existing safety training methods largely fail to address this vulnerability, due to the inherent difficulty of uncovering …

Cited by 0SourceScholar
2025

CO-SPY: Combining Semantic and Pixel Features to Detect Synthetic Images by AI

CVPR 2025poster

With the rapid advancement of generative AI, it is now possible to synthesize high-quality images in a few seconds. Despite the power of these technologies, they raise significant concerns regarding misuse. Current efforts to distinguish between real and AI-generated images may lack generalization,…

2025

EffiTune: Diagnosing and Mitigating Training Inefficiency for Parameter Tuner in Robot Navigation System

IROS 2025

Robot navigation systems are critical for various real-world applications such as delivery services, hospital logistics, and warehouse management. Although classical navigation methods provide interpretability, they rely heavily on expert manual tuning, limiting their adaptability. Conversely, purel

Cited by 1SourceScholar
2025

JailbreakDiffBench: A Comprehensive Benchmark for Jailbreaking Diffusion Models

ICCV 2025poster

Diffusion models are widely used in real-world applications, but ensuring their safety remains a major challenge. Despite many efforts to enhance the security of diffusion models, jailbreak and adversarial attacks can still bypass these defenses, generating harmful content. However, the lack of stan…

Cited by 0SourcePDFScholar
2025

Profiler: Black-box AI-generated Text Origin Detection via Context-aware Inference Pattern Analysis

EMNLP 2025

With the increasing capabilities of Large Language Models (LLMs), the proliferation of AI-generated texts has become a serious concern. Given the diverse range of organizations providing LLMs, it is crucial for governments and third-party entities to identify the origin LLM of a given AI-generated t

Cited by 0SourcePDFScholar
2025

System Prompt Hijacking via Permutation Triggers in LLM Supply Chains

ACL 2025finding

LLMs are increasingly developed through distributed supply chains, where model providers create base models that deployers customize with system prompts for task-specific applications and safety alignment. We introduce SHIP, a novel post-deployment attack that bypasses system prompts, enabling unres…

2024

BiScope: AI-generated Text Detection by Checking Memorization of Preceding Tokens

NeurIPS 2024poster

Detecting text generated by Large Language Models (LLMs) is a pressing need in order to identify and prevent misuse of these powerful models in a wide range of applications, which have highly undesirable consequences such as misinformation and academic dishonesty. Given a piece of subject text, m…

2024

EasyEdit: An Easy-to-use Knowledge Editing Framework for Large Language Models

ACL 2024system demonstrations

Large Language Models (LLMs) usually suffer from knowledge cutoff or fallacy issues, which means they are unaware of unseen events or generate text with incorrect facts owing to outdated/noisy data. To this end, many knowledge editing approaches for LLMs have emerged – aiming to subtly inject/edit u…

2024

Editing Language Model-Based Knowledge Graph Embeddings

AAAI 2024technical

Recently decades have witnessed the empirical success of framing Knowledge Graph (KG) embeddings via language models. However, language model-based KG embeddings are usually deployed as static artifacts, making them difficult to modify post-deployment without re-training after deployment. To address…

2024

Elijah: Eliminating Backdoors Injected in Diffusion Models via Distribution Shift

AAAI 2024technical

Diffusion models (DM) have become state-of-the-art generative models because of their capability of generating high-quality images from noises without adversarial training. However, they are vulnerable to backdoor attacks as reported by recent studies. When a data input (e.g., some Gaussian noise)…

2024

InstructEdit: Instruction-Based Knowledge Editing for Large Language Models

IJCAI 2024poster

Knowledge editing for large language models can offer an efficient solution to alter a model’s behavior without negatively impacting the overall performance. However, the current approaches encounter issues with limited generalizability across tasks, necessitating one distinct editor for each task,…

2024

LOTUS: Evasive and Resilient Backdoor Attacks through Sub-Partitioning

CVPR 2024poster

Backdoor attack poses a significant security threat to Deep Learning applications. Existing attacks are often not evasive to established backdoor detection techniques. This susceptibility primarily stems from the fact that these attacks typically leverage a universal trigger pattern or transformatio…

2024

MIKE: A New Benchmark for Fine-grained Multimodal Entity Knowledge Editing

ACL 2024findings

Multimodal knowledge editing represents a critical advancement in enhancing the capabilities of Multimodal Large Language Models (MLLMs). Despite its potential, current benchmarks predominantly focus on coarse-grained knowledge, leaving the intricacies of fine-grained (FG) multimodal entity knowledg…

Cited by 3SourcePDFScholar
2024

Multi-Step Continuous Decision Making and Planning in Uncertain Dynamic Scenarios Through Parallel Spatio-Temporal Trajectory Searching

RA-L 2024

Autonomous driving in urban scenarios faces uncertain dynamic changes, especially in China, where a dense mixture of cars, cyclists and pedestrians travel together on roads with random uncertain behaviors and high-risk road crossing. This letter proposes a Multi-step Continuous Decision Making and S

Cited by 4SourceScholar
2024

To Forget or Not? Towards Practical Knowledge Unlearning for Large Language Models

EMNLP 2024finding

Large Language Models (LLMs) trained on extensive corpora inevitably retain sensitive data, such as personal privacy information and copyrighted material. Recent advancements in knowledge unlearning involve updating LLM parameters to erase specific knowledge. However, current unlearning paradigms ar…

2023

Can We Edit Multimodal Large Language Models?

EMNLP 2023long main

In this paper, we focus on editing multimodal Large Language Models (LLMs). Compared to editing single-modal LLMs, multimodal model editing is more challenging, which demands a higher level of scrutiny and careful consideration in the editing process. To facilitate research in this area, we construc…

Cited by 0SourcecodeScholar
2023

Detecting Backdoors in Pre-Trained Encoders

CVPR 2023poster

Self-supervised learning in computer vision trains on unlabeled data, such as images or (image, text) pairs, to obtain an image encoder that learns high-quality embeddings for input data. Emerging backdoor attacks towards encoders expose crucial vulnerabilities of self-supervised learning, since dow…

2023

Django: Detecting Trojans in Object Detection Models via Gaussian Focus Calibration

NeurIPS 2023poster

Object detection models are vulnerable to backdoor or trojan attacks, where an attacker can inject malicious triggers into the model, leading to altered behavior during inference. As a defense mechanism, trigger inversion leverages optimization to reverse-engineer triggers and identify compromised m…

2023

Editing Large Language Models: Problems, Methods, and Opportunities

EMNLP 2023long main

Despite the ability to train capable LLMs, the methodology for maintaining their relevancy and rectifying errors remains elusive. To this end, the past few years have witnessed a surge in techniques for editing LLMs, the objective of which is to alter the behavior of LLMs \textbf{efficiently} withi…

Cited by 0SourcecodeScholar
2023

FLIP: A Provable Defense Framework for Backdoor Mitigation in Federated Learning

ICLR 2023poster

Federated Learning (FL) is a distributed learning paradigm that enables different parties to train a model together for high quality and strong privacy protection. In this scenario, individual participants may get compromised and perform backdoor attacks by poisoning the data (or gradients). Existin…

2023

MEDIC: Remove Model Backdoors via Importance Driven Cloning

CVPR 2023poster

We develop a novel method to remove injected backdoors in deep learning models. It works by cloning the benign behaviors of a trojaned model to a new model of the same structure. It trains the clone model from scratch on a very small subset of samples and aims to minimize a cloning loss that denotes…

Cited by 7SourcePDFScholar
2023

Multi-Modal Protein Knowledge Graph Construction and Applications (Student Abstract)

AAAI 2023technical

Existing data-centric methods for protein science generally cannot sufficiently capture and leverage biology knowledge, which may be crucial for many protein tasks. To facilitate research in this field, we create ProteinKG65, a knowledge graph for protein science. Using gene ontology and Uniprot kno…

2023

Novel Relation Detection: Discovering Unknown Relation Types via Multi-Strategy Self-Supervised Learning

EMNLP 2023long findings

Conventional approaches to relation extraction can only recognize predefined relation types. In the real world, new or out-of-scope relation types may keep challenging the deployed models. In this paper, we formalize such a challenging problem as Novel Relation Detection (NRD), which aims to discove…

Cited by 0SourceScholar
2022

Contrastive Demonstration Tuning for Pre-trained Language Models

EMNLP 2022finding

Pretrained language models can be effectively stimulated by textual prompts or demonstrations, especially in low-data scenarios. Recent works have focused on automatically searching discrete or continuous prompts or optimized verbalizers, yet studies for the demonstration are still limited. Concrete…

2022

OntoProtein: Protein Pretraining With Gene Ontology Embedding

ICLR 2022poster

Self-supervised protein language models have proved their effectiveness in learning the proteins representations. With the increasing computational power, current protein language models pre-trained with millions of diverse sequences can advance the parameter scale from million-level to billion-leve…

2021

Backdoor Scanning for Deep Neural Networks through K-Arm Optimization

ICML 2021spotlight

Back-door attack poses a severe threat to deep learning systems. It injects hidden malicious behaviors to a model such that any input stamped with a special pattern can trigger such behaviors. Detecting back-door is hence of pressing need. Many existing defense techniques use optimization to generat…

2021

Deep Feature Space Trojan Attack of Neural Networks by Controlled Detoxification

AAAI 2021technical

Trojan (backdoor) attack is a form of adversarial attack on deep neural networks where the attacker provides victims with a model trained/retrained on malicious data. The backdoor can be activated when a normal input is stamped with a certain pattern called trigger, causing misclassification. Many e…

2021

Learning To Filter: Siamese Relation Network for Robust Tracking

CVPR 2021poster

Despite the great success of Siamese-based trackers, their performance under complicated scenarios is still not satisfying, especially when there are distractors. To this end, we propose a novel Siamese relation network, which introduces two efficient modules, i.e. Relation Detector (RD) and Refinem…

Cited by 146PDFcodeScholar
2021

Towards Feature Space Adversarial Attack by Style Perturbation

AAAI 2021technical

We propose a new adversarial attack to Deep Neural Networks for image classification. Different from most existing attacks that directly perturb input pixels, our attack focuses on perturbing abstract features, more specifically, features that denote styles, including interpretable styles such as vi…