08-14-2026, 02:05 PM
If you're adding Google Sign-In to a small site, the basics that keep you safe:
1. Use the official OAuth 2.0 flow β don't hand-roll tokens or accept a random "verify with Google" library
2. Lock down redirect URIs β only your exact domain can be a callback
3. Verify the ID token server-side β check issuer, audience, and expiry before trusting it
4. Don't make the Google token your session β create your own session with its own expiry
5. 2FA + an audit log for anyone with admin access
Small sites get targeted exactly because they skip #2 and #3.
Any questions about your own sign-in setup?
1. Use the official OAuth 2.0 flow β don't hand-roll tokens or accept a random "verify with Google" library
2. Lock down redirect URIs β only your exact domain can be a callback
3. Verify the ID token server-side β check issuer, audience, and expiry before trusting it
4. Don't make the Google token your session β create your own session with its own expiry
5. 2FA + an audit log for anyone with admin access
Small sites get targeted exactly because they skip #2 and #3.
Any questions about your own sign-in setup?
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