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OAuth 2.0, JWTs and Service Credentials

OAuth 2.0 is delegated authorization: an app acts on a user's behalf without ever holding their password. Knowing which grant fits which caller, what a JWT does and does not prove, and how to act on behalf of a user from a backend is the difference between an integration that passes a security review and one that gets sent back.

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RELATED CONCEPTS

Enterprise SSO: SAML and OIDC RBAC, ABAC and Identity at Runtime for Agents MCP (Model Context Protocol)Audit Trails and Traceability Multi-Tenancy and Data Isolation

LESSONS THAT TEACH THIS

The FDE EngagementYou will prove who you are to four identity systems that disagree14 min→

PRACTICE THIS IN REAL QUESTIONS

LLM & GenAI FundamentalsWhat is a token, and why should an FDE care about tokenization?→AI Security, Privacy & GovernanceHow would you defend a RAG system against poisoned retrieved context and vector/embedding attacks?→System Design & Production EngineeringYour product deploys into dozens of customer environments. Design secrets management across all of them.→RAG & Agent System DesignA customer wants to expose internal APIs to a model via MCP. Design it safely: auth, least privilege, versioning.→RAG & Agent System DesignDesign RAG over 10M documents with per-user permissions: a user must never see data they can't access→LLM & GenAI FundamentalsA customer refuses to send PII to an LLM API. What are your options?→