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LTBD: Learnable Trust-Boundary Delimiters for Prompt Injection Defense

Luman Zhao et al.
arXiv CS · Papers
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cryptographycybersecurityprivacysecurity
Large language models (LLMs) perform remarkably well on complex tasks, yet remain highly vulnerable to prompt injection attacks, where malicious instructions embedded in external data can override user intent. Existing defenses remain limited by model fine-tuning requirements, vulnerability to adapt
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