exfiltration
AI security interview questions tagged exfiltration, across every topic.
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Concepts behind "exfiltration"
Explanations of the mechanisms these questions rely on.
Foundational
Data Exfiltration Channels in LLM ApplicationsAn injected model that has read private data still needs a way to get it out. LLM applications offer many: explicit tools such as email or HTTP, URLs the model asks a tool to fetch, markdown images and links that clients load or users click, link previews, and content written somewhere the attacker can read. Closing these channels deterministically is one of the most reliable defences against prompt injection, because it works no matter how the injection was phrased. LLM Application Security
Foundational
The Lethal TrifectaThe lethal trifecta, a term coined by Simon Willison in 2025, is the combination of three capabilities in one AI agent: access to private data, exposure to untrusted content, and the ability to communicate externally. With all three, an instruction hidden in untrusted content can make the agent read private data and send it out. Use the combination to trace a possible disclosure path, then remove unnecessary capabilities or enforce restrictions outside the model. A narrower token alone does not revoke an older, broader token. Agent & MCP Security