Evolution of Identity Management
Trace the history from simple password authentication to federated identity and modern decentralized approaches.
Evolution of Identity Management is a free OAuth2 & OpenID Connect Deep Dive lesson on CoddyKit — lesson 2 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the OAuth2 & OpenID Connect Deep Dive learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Welcome to Identity Evolution!
How does a site know who you are? Identity management covers verifying you (authentication) and your permissions (authorization). Let's trace how it evolved.
Simple Beginnings: Local Passwords
Early on, every system kept its own accounts. With local authentication, ten apps meant ten separate username-password pairs to juggle.
The Scaling Challenge
Local accounts didn't scale: password fatigue, risky reuse, and heavy admin cost across many systems. Identity needed to be centralized.
Centralized Directories Emerge
The fix was centralized directories — LDAP, and Microsoft's Active Directory — letting one account unlock many internal apps and easing management.
The Web and Session Management
HTTP is stateless, so the web needed memory. Cookies store a session ID in your browser, linking you to server-side state so you stay logged in.
Single Sign-On (SSO) & SAML
Single Sign-On (SSO) lets you log in once and reach many apps. SAML, an XML standard, exchanges auth data between an identity provider and service provider to make it work.
Modern Era: OAuth & OIDC
Mobile and cloud needed apps to access each other's data safely. OAuth delegates access without sharing passwords; OIDC adds an identity layer on top.
Exploring Decentralized Identity
Decentralized Identity (DID) flips the model: you own and manage your identifiers, often anchored on a blockchain, instead of trusting one central provider.
Future Trends: Passwordless & FIDO
The frontier is going passwordless — magic links, biometrics, and FIDO security keys — removing the weakest link: human-chosen passwords.
Quick Check: Evolution Milestones
Which of the following advancements marked significant steps in the evolution of identity management?
Recap: A Journey Through Identity
Recap: identity went from local logins to directories, then SSO with SAML, then OAuth and OIDC — with decentralized and passwordless methods shaping what's next.
Frequently asked questions
Is the “Evolution of Identity Management” lesson free?
Yes — the full text of “Evolution of Identity Management” is free to read here on the web, and the OAuth2 & OpenID Connect Deep Dive course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the OAuth2 & OpenID Connect Deep Dive course, upgrade to CoddyKit PRO.
What will I learn in “Evolution of Identity Management”?
Trace the history from simple password authentication to federated identity and modern decentralized approaches. You practise OAuth2 & OpenID Connect Deep Dive with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start OAuth2 & OpenID Connect Deep Dive?
No prior experience is required. OAuth2 & OpenID Connect Deep Dive on CoddyKit is structured for beginners through advanced learners; this is — lesson 2 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Evolution of Identity Management” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this OAuth2 & OpenID Connect Deep Dive lesson?
Yes. Every OAuth2 & OpenID Connect Deep Dive lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- AuthN vs AuthZ Explained
- Evolution of Identity Management
- Basic Security Concepts & Terminology
- Authentication Factors & Multi-Factor Auth