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System prompts are not secure boundaries in LLM applications

System prompts in LLM applications are not a secure boundary and can be exposed through prompt extraction attacks, unlike traditional source code. Attackers can manipulate models using conversational techniques to reveal hidden instructions, which provide insights into safety mechanisms and application logic. Developers should not treat prompts as inherently secret and instead design systems assuming they may eventually be exposed. AI

IMPACT Highlights a critical security design flaw in current LLM applications, urging developers to reconsider prompt confidentiality.

RANK_REASON The item discusses a security risk related to LLM system prompts, offering analysis and advice rather than announcing a new product or research finding.

Read on dev.to — LLM tag →

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  1. dev.to — LLM tag TIER_1 English(EN) · Suny Choudhary ·

    System Prompt Leakage: Why Hidden AI Instructions Are Not a Security Boundary

    <p>Most developers treat system prompts like hidden configuration.</p> <p>That is the mistake.</p> <p>In an LLM application, a system prompt is not source code sitting safely behind access controls. It lives inside the model’s context, where user instructions, external content, a…