RAG Security for Financial Services: SOX, Data Walls, and Classification-Based Access

Financial services organizations are rapidly adopting AI assistants for research, compliance screening, and client reporting. But the regulatory landscape — SOX, MiFID II, information barriers — demands precise control over who sees what data through AI systems. A research analyst querying a RAG system must never see deal-side information, and vice versa.

Information barriers (data walls) are the defining challenge. In a traditional system, network segmentation and access controls enforce separation between deal teams and research teams. But a shared RAG pipeline that ingests both research and deal-side documents creates a new path around these walls. Metadata filters aren't sufficient because missing tags default to open access — exactly the wrong behavior in a regulated environment.

Gateco's deny-by-default model is a natural fit for information barriers. Define ABAC policies that match on resource.domain (e.g., "deal-side", "research", "public-markets") and principal.groups (derived from your identity provider). No policy match means no data returned. The audit trail records every retrieval decision, providing the evidence trail SOX and MiFID II require.

Classification-based access is the second pillar. Financial documents span a wide sensitivity range: public filings, internal research, confidential client data, and restricted deal information. Gateco's four-level classification system (public, internal, confidential, restricted) maps directly to financial services data categories. Classification suggestions can scan existing vector stores and suggest appropriate levels, reducing the weeks of manual labeling that compliance teams dread.

The audit trail is where Gateco pays for itself during examinations. When regulators ask "show me all AI-assisted access to confidential client data in Q4", it's a single API call with date range and classification filters. Every retrieval includes the full policy evaluation trace — which principal requested it, which policies were evaluated, what was allowed or denied, and why. This level of granularity turns a multi-week audit preparation into an afternoon.

For firms evaluating Gateco: the free tier validates the approach against your existing vector infrastructure. Pro provides the ABAC policies and audit export that compliance requires. Enterprise adds SIEM streaming for real-time monitoring and SSO for identity integration — both common requirements in financial services security architecture.