Secure Multi-Tenant LLM Analytics with Row-Level Security

Anuranjan Mondal· June 29, 2026 View original

Summary

This post details how PAR built a production-ready multi-tenant LLM analytics system on AWS, enforcing row-level security through a three-layer architecture: cryptographic request signing, semantic validation, and programmatic data isolation.

PAR has outlined its methodology for constructing a production-grade multi-tenant analytics system powered by large language models (LLMs) on Amazon Web Services. A key focus of their design is the robust enforcement of row-level security, crucial for preventing cross-tenant data exposure. This security is achieved through a sophisticated three-layer architecture: cryptographic request signing using AWS SigV4, semantic validation performed on Amazon Bedrock, and programmatic data isolation implemented via Split-Plane SQL. Each layer operates independently, significantly reducing the risk of data breaches, even in scenarios where the LLM itself might be compromised or manipulated.

Why it matters

For organizations building or deploying multi-tenant AI applications, ensuring stringent data isolation and security is paramount to protect sensitive customer information and maintain compliance.

How to implement this in your domain

  1. 1Design a multi-layered security architecture for LLM applications, including request signing.
  2. 2Implement semantic validation on your chosen LLM platform (e.g., Amazon Bedrock).
  3. 3Utilize programmatic data isolation techniques like Split-Plane SQL for row-level security.
  4. 4Conduct thorough security audits and penetration testing on each layer of the system.
  5. 5Establish monitoring and alerting for potential security vulnerabilities or data access anomalies.

Who benefits

SaaSCloud ProvidersFinancial ServicesHealthcareGovernment

Key takeaways

  • Multi-tenant LLM analytics require robust row-level security.
  • A three-layer architecture enhances data isolation and security.
  • Cryptographic signing, semantic validation, and data isolation are key components.
  • Independent security layers reduce risks even if the LLM is compromised.

Original post by Anuranjan Mondal

"In this post, we show you how PAR built a production-ready multi-tenant LLM analytics system that enforces row-level security through a three-layer architecture: cryptographic request signing with AWS SigV4, semantic validation on Amazon Bedrock, and programmatic data isolation v…"

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