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Wen-Rui Yu

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#artificial intelligence Preprint Sep 2026

Capable yet Parsimonious: Extracting and Characterizing Hidden Chain-of-Thought in Frontier Models

It is found that Astra exhibits token-efficient directed reasoning, selecting a correct trajectory earlier, while resolving elementary steps internally and externalizing only crucial reasoning, which provides a behavioral lens on frontier-model reasoning beyond benchmark scores.

Xiao-Yu Luo, Tao Ren, Wen-Rui Yu et al. · 0 citations
#machine learning Preprint Sep 2026

When Topology Betrays Privacy: Lattice-Based Reconstruction Attacks on Secure Aggregation in Decentralized Federated Learning

The results show that colluding semi-honest nodes can recover the original local updates of honest nodes, enabling downstream reconstruction of private training data, and demonstrate that SA alone does not guarantee privacy in DFL when local aggregation induces asymmetric observations.

Wen-Rui Yu, Chang-Long Ji, Johannes Bjerva et al. · 0 citations

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