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Yuanpu Cao

11 accepted papers

2026

Towards Robust Multimodal Large Language Models Against Jailbreak Attacks

CVPR 2026

While multimodal large language models (MLLMs) have achieved remarkable success in recent advancements, their susceptibility to jailbreak attacks has come to light. In such attacks, adversaries exploit carefully crafted prompts to coerce models into generating harmful or undesirable content. Existin

Cited by 0SourcecodeScholar
2025

AdvI2I: Adversarial Image Attack on Image-to-Image Diffusion Models

ICML 2025poster

Recent advances in diffusion models have significantly enhanced the quality of image synthesis, yet they have also introduced serious safety concerns, particularly the generation of Not Safe for Work (NSFW) content. Previous research has demonstrated that adversarial prompts can be used to generate…

2025

Phi: Preference Hijacking in Multi-modal Large Language Models at Inference Time

EMNLP 2025

Recently, Multimodal Large Language Models (MLLMs) have gained significant attention across various domains. However, their widespread adoption has also raised serious safety concerns.In this paper, we uncover a new safety risk of MLLMs: the output preference of MLLMs can be arbitrarily manipulated

2025

Shadow-Activated Backdoor Attacks on Multimodal Large Language Models

ACL 2025finding

This paper delves into a novel backdoor attack scenario, aiming to uncover potential security risks associated with Multimodal Large Language Models (MLLMs) during multi-round open-ended conversations with users. In the practical use of MLLMs, users have full control over the interaction process wit…

2025

TruthFlow: Truthful LLM Generation via Representation Flow Correction

ICML 2025poster

Large language models (LLMs) are known to struggle with consistently generating truthful responses. While various representation intervention techniques have been proposed, these methods typically apply a universal representation correction vector to all input queries, limiting their effectiveness a…

Cited by 0SourcePDFScholar
2025

WordGame: Efficient & Effective LLM Jailbreak via Simultaneous Obfuscation in Query and Response

NAACL 2025findings

The recent breakthrough in large language models (LLMs) such as ChatGPT has revolutionized every industry at an unprecedented pace. Alongside this progress also comes mounting concerns about LLMs’ susceptibility to jailbreaking attacks, which leads to the generation of harmful or unsafe content. Whi…

Cited by 11SourcePDFScholar
2024

Defending Against Alignment-Breaking Attacks via Robustly Aligned LLM

ACL 2024long

Recently, Large Language Models (LLMs) have made significant advancements and are now widely used across various domains. Unfortunately, there has been a rising concern that LLMs can be misused to generate harmful or malicious content. Though a line of research has focused on aligning LLMs with huma…

2024

Personalized Steering of Large Language Models: Versatile Steering Vectors Through Bi-directional Preference Optimization

NeurIPS 2024poster

Researchers have been studying approaches to steer the behavior of Large Language Models (LLMs) and build personalized LLMs tailored for various applications. While fine-tuning seems to be a direct solution, it requires substantial computational resources and may significantly affect the utility of…

2024

Stealthy and Persistent Unalignment on Large Language Models via Backdoor Injections

NAACL 2024long

Recent developments in Large Language Models (LLMs) have manifested significant advancements. To facilitate safeguards against malicious exploitation, a body of research has concentrated on aligning LLMs with human preferences and inhibiting their generation of inappropriate content. Unfortunately,…

2024

Tackling the Data Heterogeneity in Asynchronous Federated Learning with Cached Update Calibration

ICLR 2024poster

Asynchronous federated learning, which enables local clients to send their model update asynchronously to the server without waiting for others, has recently emerged for its improved efficiency and scalability over traditional synchronized federated learning. In this paper, we study how the asynchro…

Cited by 18SourcePDFScholar
2020

RLCard: A Platform for Reinforcement Learning in Card Games

IJCAI 2020poster

We present RLCard, a Python platform for reinforcement learning research and development in card games. RLCard supports various card environments and several baseline algorithms with unified easy-to-use interfaces, aiming at bridging reinforcement learning and imperfect information games. The platfo…