机构
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Lyles School of Civil and Construction Engineering, Purdue University(普渡大学莱尔斯土木与建筑工程学院)
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Department of Civil and Environmental Engineering, University of Wisconsin-Madison(威斯康星大学麦迪逊分校土木与环境工程系)
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Google(谷歌)
Comments20 pages, 10 figures, 3 tables. Training-free harmful-prompt detector via angular deviation in LLM residual streams. Evaluated on six Qwen variants (base / instruct / abliterated). Achieves AUROC over 0.937 (harmful-vs-normative) and 1.000 (harmful-vs-benign-aggressive) with no harmful training data
机构
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Guangdong Provincial Key Laboratory of Space-Aerial Networking and Intelligent Sensing, Harbin Institute of Technology, Shenzhen(广东省空天网络与智能感知重点实验室,哈尔滨工业大学(深圳))
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Peng Cheng Laboratory (PCL), Shenzhen(鹏城实验室)
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Information Systems Technology and Design, Singapore University of Technology and Design(新加坡科技设计大学信息系统技术与设计系)
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School of Computer Science and Engineering, Central South University, Changsha(中南大学计算机科学与工程学院)