Zhipeng Wang
2 indexed papers
Recent (6 mo)
2With code
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226
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AI×1ML×1Crypto×1
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2026
Five Attacks on x402 Agentic Payment Protocol
This paper analyzes the x402 agentic payment protocol, demonstrating through five concrete, practical attacks that it is vulnerable across multiple stages of its payment workflow.
S-SPPO: Semantic-Calibrated Self-Play Preference Optimization
S-SPPO introduces a dual-space semantic calibration framework to stabilize Self-Play Preference Optimization (SPPO), preventing policy degeneration when preference oracles assign overly confident wins to semantically similar responses.
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Papers
cs.AIcs.LGRecentJun 1, 2026
S-SPPO: Semantic-Calibrated Self-Play Preference Optimization
Xiwen Chen, Wenhui Zhu, Jingjing Wang, Peijie Qiu +12 more
S-SPPO introduces a dual-space semantic calibration framework to stabilize Self-Play Preference Optimization (SPPO), preventing policy degeneration when preference oracles assign overly confident wins…
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cs.CRRecentMay 12, 2026