Papers by Maria-Irina Nicolae
ProxyPrompt: Securing System Prompts against Prompt Extraction Attacks (2026.findings-acl)
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| Challenge: | Existing defenses against prompt extraction are either easily bypassed or require constant updates to address new threats. |
| Approach: | They propose a new mechanism that replaces the original prompt with a proxy to prevent prompt leakage by obfuscating the extracted prompt. |
| Outcome: | The proposed defense outperforms the existing defense, which only achieves 42.80% of the prompts extracted from the original task. |