William Lugoloobi
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126
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Crypto×1AI×1HCI×1ML×1
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2026
Known By Their Actions: Fingerprinting LLM Browser Agents via UI Traces
This paper demonstrates that an agent's behavioral patterns, captured through passive UI interaction traces, are sufficient to identify the underlying LLM model with high accuracy, posing a significant security risk.
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Papers
cs.CRcs.AIcs.HCRecentMay 14, 2026
Known By Their Actions: Fingerprinting LLM Browser Agents via UI Traces
William Lugoloobi, Samuelle Marro, Jabez Magomere, Joss Wright +1 more
This paper demonstrates that an agent's behavioral patterns, captured through passive UI interaction traces, are sufficient to identify the underlying LLM model with high accuracy, posing a significan…
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