AlcaTRAz - Anchored Tree-Rule Defense Against Jailbreaks
Large language models (LLMs) are vulnerable to jailbreak attacks that bypass safety alignment through carefully crafted prompts. Many existing defenses require access to model weights or internals, making them difficult to apply to black-box deployments. We propose AlcaTRAz (Anchored Tree-Rule defense Against jailbreaks), a prompt-level defense based on rule trees that operates exclusively on the input text and requires no modification or retraining of the target model. The method automatically learns a transferable transformation rule that inserts controlled character-level perturbations at selected positions, thereby disrupting structural regularities exploited by jailbreak attacks whil...
| Authors | Jakub Reš, Petr Kaška, Martin Perešíni et al. |
|---|---|
| Primary category | cs.CR |
| Published | 3 September 2026 |
| Last updated at source | 3 September 2026 |
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