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Zijian Liu

2 papers indexed

arxivmath.OCcs.LGstat.ML2026-06-30

Random Reshuffling Dominates Stochastic Gradient Descent

Zijian Liu

Stochastic Gradient Descent ($\textsf{SGD}$) is one of the most classical optimization algorithms with favorable theoretical guarantees, yet the practical implementation of $\textsf{SGD}$ differs subtly from its well-known form and is often referred to as Shuffling Stochastic Gra…

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arxivcs.CRcs.AI2026-06-25

ShareLock: A Stealthy Multi-Tool Threshold Poisoning Attack Against MCP

Liwei Liu, Tianzhu Han, Zijian Liu, Zishu Dong, Na Ruan

With the rapid evolution of LLM-driven agents, Model Context Protocol (MCP), an open protocol bridging LLMs with external tools, has quickly become foundational to modern agent ecosystems. However, the expanding adoption of MCP has also introduced novel security concerns such as…

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