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Prompt Injection Defense: Input Sanitization, Guardrails, Permissions, and Monitoring

Prompt injection is the most critical security vulnerability for LLM applications. Unlike traditional injection attacks, prompt injection targets the model's instruction-following behavior rather than exploiting code execution. Here is a defense-in-depth approach to protecting your AI application.

Understanding the Threat

Prompt injection comes in two forms. Direct injection happens when a user deliberately crafts input to override system instructions.…