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Beyond the Login Screen: Understanding What Really Happens in Enterprise Single Sign-On

Practitioner & Troubleshooting Focus

What actually happens after you click Login?

Beyond the screen, beyond the redirects, beyond the success message, enterprise Single Sign-On reveals its true complexity. Beyond the Login Screen exposes the real mechanics of SSO—HTTP calls, cookies, tokens, and protocol exchanges—across Spring Boot, Keycloak, and Azure Entra ID. This book is for professionals who need more than configurations: it is for those who must understand identity deeply, troubleshoot decisively, and deliver reliable authentication experiences when it matters most.

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About

About the Book

Single Sign-On often appears deceptively simple: a login screen, a successful redirect, and a seamless user experience. Yet beneath that surface lies a complex choreography of protocols, cookies, redirects, tokens, and trust boundaries that few practitioners ever fully see. Beyond the Login Screen takes readers into that hidden layer of enterprise identity, revealing what truly happens when a Spring Boot application delegates authentication through Keycloak to Azure Entra ID using SAML 2.0 and OpenID Connect. Written for architects, engineers, and IAM professionals, this book bridges the long-standing divide between application development and identity administration, equipping readers with the holistic understanding required to troubleshoot faster, reduce Mean Time to Resolution, and deliver consistently reliable SSO experiences. In an era where code can be generated by AI, this book focuses on the skill that cannot be automated: deep system insight that translates directly into customer trust and business value.

Author

About the Author

Binit Datta

Binit Datta is a strategic, customer-centric technology leader with over three decades of experience designing, building, and operating large-scale enterprise systems across more than ten business verticals and numerous Fortune 50 organizations. His career has been defined by a rare ability to bridge deep technical execution with business outcomes—using architecture not as an academic exercise, but as a practical tool to deliver reliability, scalability, and measurable customer value.

With expertise spanning enterprise architecture, identity and access management, cloud platforms, security, and modern application development, Binit has consistently worked at the intersection of systems that must perform under real-world pressure. He is particularly known for his focus on prevention over cure—helping organizations avoid costly production failures through deep system understanding, fast root-cause analysis, and disciplined architectural thinking.

A passionate mentor and lifelong learner, Binit believes the most valuable technologists are those who can see beyond silos—understanding applications, platforms, and identity infrastructure as a single, interconnected system. In an era increasingly shaped by generative AI, his work advocates for the enduring importance of human judgment, architectural fluency, and customer-focused problem solving.

This book reflects that philosophy: written for practitioners who want to understand not just how systems work, but why they behave the way they do—and how that understanding translates into lower MTTR, stronger customer trust, and sustained product innovation.

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