Glossary
What is an AI Security Layer?
An AI Security Layer is the masking, routing and rehydration layer that sits between an application and AI providers.
Definition
An AI Security Layer is the masking, routing and rehydration layer that sits between an application and AI providers.
Definition
AI Security Layer — short definition
Why it matters
Why this matters
Direct provider calls leave no enforcement point for masking, policy, or auditing. The AI Security Layer centralizes that surface so security and platform teams have one place to control AI traffic.
Direct provider calls leave no enforcement point for masking, policy, or auditing. The AI Security Layer centralizes that surface so security and platform teams have one place to control AI traffic.
How it works
How it works
Framework
AI Security Layer process
- 01
Mask
Personal and sensitive data is detected and replaced with placeholders.
- 02
Route
The masked prompt is forwarded to the configured provider with your own keys.
- 03
Rehydrate
Placeholders in the response are restored before reaching your application.
Implementation
Learn how this works in Privian
From definition to implementation, docs and architecture — the same idea at different layers.
FAQ
Frequently asked questions
- Is an AI Security Layer the same as an LLM gateway?
- No. An LLM gateway is the routing component. An AI Security Layer combines a gateway with PII masking, prompt security, rehydration and zero retention.
- Where does an AI Security Layer sit?
- Between your application and one or more model providers, as a network hop your AI requests flow through.
- Does an AI Security Layer change my provider relationship?
- With BYOK, no — your contract and billing with the provider stay intact. The security layer routes; it does not resell.
Where to go next
From definition to implementation
This entry is part of the Privian content library. If you are evaluating how this concept is implemented in practice, the links below are the most direct paths.
Related product
AI Security Layer in Privian
Privian implements the AI Security Layer as a privacy-first gateway with masking, BYOK routing and rehydration.
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