Security--Fidelity Tradeoffs: The Hidden Cost of Prompt Injection Defense

arXiv:2606. 30783v1 Announce Type: cross Abstract: We identify a security-fidelity tradeoff in defending LLMs against indirect prompt injection: defenses resist injected instructions largely by suppressing untrusted text, which corrupts tasks that must preserve it, such as translation and document editing.

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• llms
• benchmarks