Xin Zhang

StaR-KVQA: Structured Reasoning Traces for Implicit-Knowledge Visual Question Answering

Pisces: Cryptography-based Private Retrieval-Augmented Generation with Dual-Path Retrieval

CodeGenGuard: A Watermark for Code Generation Models

EVOREFUSE: Evolutionary Prompt Optimization for Evaluation and Mitigation of LLM Over-Refusal to Pseudo-Malicious Instructions

ShieldHead: Decoding-time Safeguard for Large Language Models