BBN-U.Oregon’s ALERT system at GenAI Content Detection Task 3: Robust Authorship Style Representations for Cross-Domain Machine-Generated Text Detection

Hemanth Kandula, Chak Fai Li, Haoling Qiu, Damianos Karakos, Hieu Man, Thien Huu Nguyen, Brian Ulicny


Abstract
This paper presents BBN-U.Oregon’s system, ALERT, submitted to the Shared Task 3: Cross-Domain Machine-Generated Text Detection. Our approach uses robust authorship-style representations to distinguish between human-authored and machine-generated text (MGT) across various domains. We employ an ensemble-based authorship attribution (AA) system that integrates stylistic embeddings from two complementary subsystems: one that focuses on cross-genre robustness with hard positive and negative mining strategies and another that captures nuanced semantic-lexical-authorship contrasts. This combination enhances cross-domain generalization, even under domain shifts and adversarial attacks. Evaluated on the RAID benchmark, our system demonstrates strong performance across genres and decoding strategies, with resilience against adversarial manipulation, achieving 91.8% TPR at FPR=5% on standard test sets and 82.6% on adversarial sets.
Anthology ID:
2025.genaidetect-1.42
Volume:
Proceedings of the 1stWorkshop on GenAI Content Detection (GenAIDetect)
Month:
January
Year:
2025
Address:
Abu Dhabi, UAE
Editors:
Firoj Alam, Preslav Nakov, Nizar Habash, Iryna Gurevych, Shammur Chowdhury, Artem Shelmanov, Yuxia Wang, Ekaterina Artemova, Mucahid Kutlu, George Mikros
Venues:
GenAIDetect | WS
SIG:
Publisher:
International Conference on Computational Linguistics
Note:
Pages:
358–364
Language:
URL:
https://aclanthology.org/2025.genaidetect-1.42/
DOI:
Bibkey:
Cite (ACL):
Hemanth Kandula, Chak Fai Li, Haoling Qiu, Damianos Karakos, Hieu Man, Thien Huu Nguyen, and Brian Ulicny. 2025. BBN-U.Oregon’s ALERT system at GenAI Content Detection Task 3: Robust Authorship Style Representations for Cross-Domain Machine-Generated Text Detection. In Proceedings of the 1stWorkshop on GenAI Content Detection (GenAIDetect), pages 358–364, Abu Dhabi, UAE. International Conference on Computational Linguistics.
Cite (Informal):
BBN-U.Oregon’s ALERT system at GenAI Content Detection Task 3: Robust Authorship Style Representations for Cross-Domain Machine-Generated Text Detection (Kandula et al., GenAIDetect 2025)
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PDF:
https://aclanthology.org/2025.genaidetect-1.42.pdf