TOTP Example

An Elixir Phoenix Framework application demonstrating TOTP two factor authentication.

Features

• Generates a random secret code, stored in the database alongside a user
• Builds a Google Authenticator compatible enrolment URL and displays a QR code.
• Outputs the expected TOTP code, refreshing every 30 seconds.

Getting Started

• Install dependencies with mix deps.get
• Create and migrate your database with mix ecto.setup
• Install Node.js dependencies with cd assets && npm install
• Start Phoenix endpoint with mix phx.server

Now you can visit localhost:4000 from your browser.

Learn More

• TOTP Explanation: https://en.wikipedia.org/wiki/Time-based_One-time_Password_algorithm
• QR Code URI Format: https://github.com/google/google-authenticator/wiki/Key-Uri-Format