Author

Ning-Hui Li

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#artificial intelligence Preprint Aug 2026

PII-TRACE: A Benchmark for Context-Aware PII Detection in Multi-Turn LLM Conversations

This work introduces PII-Tracer, a compact 0.6B-parameter detector trained with conversation-level supervision that attains the highest entity-level coverage of any system the authors evaluate and also performs strongly on standard single-record benchmarks.

Kai-Yuan Zhang, Chuan Wang, Joey Zhong et al. · 0 citations

Preprint Sep 2026

Privacy Leakage from a Thousand Words: Millipixel Location Recovery from Dot Maps

This paper systematically analyzes the privacy risks associated with dot maps and presents AutoLocate, an automated framework for high-precision location recovery that achieves average recovery errors as low as 1 meter on small-scale maps of the United States, over 200x more accurate than existing approaches.

Yuntao Du, Tanishq Pauskar, Hao Wang et al. · 0 citations