Papers by Pedro Schindler Freire Brasil Ribeiro
Modeling, Evaluating, and Embodying Personality in LLMs: A Survey (2025.findings-emnlp)
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Iago Alves Brito, Julia Soares Dollis, Fernanda Bufon Färber, Pedro Schindler Freire Brasil Ribeiro, Rafael Teixeira Sousa, Arlindo Rodrigues Galvão Filho
| Challenge: | This survey provides a comprehensive overview of the LLM-driven personality scenario. |
| Approach: | This survey provides a comprehensive overview of the LLM-driven personality scenario. |
| Outcome: | The proposed taxonomy analyzes the limitations of existing methods and identifies key research gaps. |
Proxy Barrier: A Hidden Repeater Layer Defense Against System Prompt Leakage and Jailbreaking (2025.findings-emnlp)
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Pedro Schindler Freire Brasil Ribeiro, Iago Alves Brito, Rafael Teixeira Sousa, Fernanda Bufon Färber, Julia Soares Dollis, Arlindo Rodrigues Galvão Filho
| Challenge: | Prompt injection and jailbreak attacks remain a critical vulnerability for large language models . a lightweight defense that interposes a proxy LLM between the user and the target model addresses this vulnerability . |
| Approach: | a lightweight proxy LLM is interposed between the user and the target model to prevent prompt injection and jailbreak attacks. |
| Outcome: | ProB outperforms baselines and achieves up to 98.8% defense effectiveness . it is deployable entirely at the API level and requires no access to model weights or prompts . |