Visualize Your Login Authentication Flow with a Sequence Diagram
Map every step from credential submission to JWT token issuance with a clear, editable sequence diagram built for engineers and security teams.
What This Template Offers
A production-ready sequence diagram covering the complete login authentication lifecycle — from user input to secure session establishment.
- 5 participants: User (actor), Browser, Auth Service, User Database, and Token Service
- 12 numbered messages spanning credential submission through dashboard redirect
- Activation bars showing Auth Service and Token Service lifetimes at a glance
- Inline security notes on HTTPS enforcement, bcrypt hashing, and token expiry windows
- Configurable font size, sequence numbers, and zoom/pan for large diagrams
Perfect Use Cases
API and Backend Documentation
Show your team exactly how the authentication API works end-to-end, from the POST /api/auth/login call to the 200 OK response carrying access and refresh tokens.
Security Review and Auditing
Present your login flow to security reviewers or auditors, highlighting bcrypt password hashing, HTTPS-only credential transport, and short-lived JWT access tokens.
Onboarding New Engineers
Help new developers understand the auth architecture quickly with a numbered, visual walkthrough of every service interaction and handoff.
Architecture Design and Planning
Use this as a starting point when designing or refactoring authentication systems — swap in your own services and adapt the flow to your stack.
How to Customize
Edit Participants
Add, remove, or rename actors and systems to match your architecture — for example, replace 'Auth Service' with 'Keycloak' or 'Auth0'.
Adjust the Message Flow
Modify message labels and arrow types, add activation bars for new services, or insert extra steps like MFA verification or rate-limit checks.
Add Context Notes
Attach notes to any participant to call out security requirements, SLA constraints, or implementation details your audience needs to know.
Why Choose This Sequence Diagram Template
Key Benefits
Pro Tips
Create Your Own Authentication Sequence Diagram
Describe your auth flow and get a ready diagram in seconds — no setup, no sign-up needed.
Create Your Own Authentication Sequence Diagram
Describe your auth flow and get a ready diagram in seconds — no setup, no sign-up needed.
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