Learn how to secure multi-LLM context routing with Zero Trust and Post-Quantum cryptography. Protect MCP deployments from tool poisoning and prompt injection.

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UMA 2.0 (User-Managed Access) addresses the limitations of traditional OAuth2 when delegating resource access to third parties rather than just acting on behalf of the owner. The post explains the five-actor model (Resource Owner, Requesting Party, Client, Authorization Server, Resource Server), how Resource Sets group data under unified policies, and the three-token handshake (PAT, Permission Ticket, RPT) that enables asynchronous, granular access control. Practical engineering advice covers avoiding scope explosion, caching RPTs with short TTLs, batching permission tickets, and using SSOJet for identity synchronization and SCIM directory sync.

Zero Trust Infrastructure for Multi-LLM Context Routing

Why traditional OAUTH hits a wall and we need UMA

Meet the cast: Five actors in the UMA 2.0 dance

The technical handshake: PATs, Tickets, and RPTs

Implementation hurdles and engineering best practices

Tooling Spotlight: Building the backbone with SSOJet