In the Cyber Security domain, we worry about data leakage. If RAG systems are retrieving private info and putting it into the context window, are we creating a massive security hole by accident?
3 answers
This is a critical concern. The "bad design" here isn't just about performance; it's about the lack of Access Control Lists (ACLs) within the vector database. Many systems simply retrieve the "most relevant" info without checking if the current user has the permission to see it. If a low-level employee asks a general question and the RAG pulls a snippet from a restricted executive PDF, that’s a major breach. A secure design must include a permission-aware retrieval layer that filters results based on the user's identity before the agent ever sees the data.
Patrick here. Could we use PII (Personally Identifiable Information) detection at the ingestion stage to automatically scrub sensitive data before it hits the memory?
Most leaks happen because of prompt injection, where a user tricks the agent into dumping its entire retrieved context window.
Martha is right. Heather, you need robust output filtering to ensure the agent doesn't reveal the "sources" it was given if they contain sensitive information.
Patrick, scrubbing is a good start, but it can sometimes strip out the very context the agent needs to be helpful. A better approach is "differential privacy" or encrypted vector search, where the system can find relevance without the underlying data being exposed in plain text to the entire infrastructure.