•5 min read
Mastering Modern Authentication: A Guide to Secure Communication
This article provides a practical guide to modern authentication patterns using OIDC and OAuth 2.0. Through three easy-to-understand sequence diagrams, it visualizes the secure flows for backend-to-backend communication, frontend-to-backend user logins with stateful sessions, and a combined scenario where a backend service makes a B2B call to fulfill a frontend request. It explains the core concepts of token exchange, session management, and role-based access control (RBAC), making these complex interactions accessible to developers and system architects.
