2025

SEM: Reinforcement Learning for Search-Efficient Large Language Models

pdf arxiv code

FragFake: A Dataset for Fine-Grained Detection of Edited Images with Vision Language Models

Zhen Sun, Ziyi Zhang, Zeren Luo, Zeyang Sha, Tianshuo Cong, Zheng Li, Shiwen Cui, Weiqiang Wang, Jiaheng Wei, Xinlei He, Qi Li, Qian Wang; Arxiv
pdf arxiv code

Thought Manipulation: External Thought Can Be Efficient for Large Reasoning Models

Yule Liu, Jingyi Zheng, Zhen Sun, Zifan Peng, Wenhan Dong, Zeyang Sha, Shiwen Cui, Weiqiang Wang, Xinlei He; Arxiv
pdf arxiv code

2024

Conversation Reconstruction Attack Against GPT Models

Junjie Chu, Zeyang Sha, Michael Backes, Yang Zhang; EMNLP 2024
pdf arxiv code

ZeroFake: Zero-Shot Detection of Fake Images Generated and Edited by Text-to-Image Generation Models

pdf arxiv code

Games and Beyond: Analyzing the Bullet Chats of Esports Livestreaming

Yukun Jiang, Xinyue Shen, Rui Wen, Zeyang Sha, Junjie Chu, Yugeng Liu, Michael Backes, Yang Zhang; ICWSM 2024
pdf arxiv code

Prompt Stealing Attacks Against Large Language Models

pdf arxiv code

Comprehensive Assessment of Toxicity in ChatGPT

Boyang Zhang, Xinyue Shen, Wai Man Si, Zeyang Sha, Zeyuan Chen, Ahmed Salem, Yun Shen, Michael Backes, Yang Zhang; Arxiv
pdf arxiv code

2023

DE-FAKE: Detection and Attribution of Fake Images Generated by Text-to-Image Generation Models

pdf arxiv code Best paper finalist at CSAW Europe 2024

Can’t Steal? Cont-Steal! Contrastive Stealing Attacks Against Image Encoders

pdf arxiv code

From Visual Prompt Learning to Zero-Shot Transfer: Mapping Is All You Need

pdf arxiv code

2022

Fine-Tuning Is All You Need to Mitigate Backdoor Attacks

pdf arxiv code