Using Short-Lived JWTs for Secure SSO in Shopify Without Logging Users Out
Using short-lived JWT tokens is a common method to improve security while ensuring a smooth login experience for users in your Shopify store. The Shopify SSO app allows for this effective implementation by using refresh tokens behind the scenes. Here’s how the process usually works:
Short-Lived Access Tokens (JWT)
When a user starts to log in through the Shopify SSO app, the identity provider (IdP) issues a short-lived JWT (JSON Web Token) as an access token. This token:
– Has a short expiry (e.g., 5 to 15 minutes),
– Authenticates the login session through the SSO app,
– Is verified by the SSO app before redirecting the user into Shopify.
This setup minimizes the risk of long-term misuse for any intercepted token.
Long-Lived Refresh Tokens (For Persistent Login)
Along with the short-lived JWT, the system can keep a long-lived refresh token, which is typically stored securely (e.g., in an HttpOnly cookie) to prevent exposure through client-side scripts. When the JWT expires:
– The refresh token is sent securely to the SSO server,
– A new access token is generated without requiring re-authentication,
– The user remains logged in to Shopify without interruption.
This prevents the user from needing to log in every few minutes.
Security Benefits
– Short-lived tokens reduce the attack window.
– Users can stay logged in even across sessions or tabs.
– Server-side revocation of refresh tokens is possible if needed (e.g., if a user is removed or access is revoked).
– Refresh token rotation helps reduce the risk of token replay.
By implementing a short-lived JWT and refresh token setup, the Shopify SSO app provides:
– Strong session security,
– A continuous login experience for users,
– Full control over session and token lifecycle.
This method meets modern requirements for secure authentication and improves both security and usability in Shopify SSO configurations.
