Flowcharts & Processes

OAuth 2.0 Authorization Code Flow

Flowcharts & Algorithms diagram · made in Skemio

Flowchart of OAuth 2.0 Authorization Code Flow showing redirect to auth server, code return to client, backend secret exchange, and token issue.
Flowchart of OAuth 2.0 Authorization Code Flow showing redirect to auth server, code return to client, backend secret exchange, and token issue.
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What it shows

  • User authenticates directly with the Identity Provider (IdP).
  • Frontend receives a short-lived one-time authorization code.
  • Backend exchanges code + client secret for tokens via secure back-channel.

The takeaway

Never expose client secrets on the client side; exchange authorization codes over server back-channels.

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