“Sign in with Google” is one of the most-tapped buttons on the internet. A single press and you’re authenticated — no new password to invent, no verification email to wait for, no account creation form to fill out.
It’s convenient. It also quietly connects your identity across dozens of services, gives each of those services access to a slice of your Google data, and creates a cascading failure point that can cost you access to every connected account at once.
This isn’t a reason to never use social login. It’s a reason to understand what you’re agreeing to.
How Social Login Works (What’s Actually Happening)
When you tap “Sign in with Google,” you’re using a protocol called OAuth. The process looks simple from the outside, but several things happen in sequence:
- The app redirects you to Google
- You authenticate with Google (your password, 2FA, etc.)
- Google asks you to grant the app specific permissions
- If you approve, Google issues the app an access token
- You’re now signed in — and the app has persistent access to whatever you approved
The key phrase is “persistent access.” The app received a token that remains valid for as long as you haven’t revoked it. That token lets the app call Google’s API on your behalf — potentially indefinitely, without you re-entering your password.
Most users tap “allow” and move on. Few go back to audit what they’ve authorized.
What Permissions Get Granted
When you sign in with Google to a new service, the minimum it receives is your name, profile photo, and email address. Many apps request more.
Common additional permissions that apps request through Google login:
- Access to your contacts — some apps request read access to your full contact list as part of onboarding
- Calendar read access — common in productivity and scheduling apps
- Gmail read access — email clients and productivity tools sometimes request this to surface relevant content
- Google Drive access — apps that want to store files in your Drive
- YouTube history — media apps sometimes request viewing history
The permissions screen lists what’s being requested. Most people don’t read it carefully. The act of pressing “continue” is treated as consent to whatever appears on that screen.
Once granted, these permissions persist. An app you signed up for three years ago and haven’t opened since may still have read access to your contacts, your calendar, or your inbox.
The Centralization Risk: A Single Point of Failure
The structural problem with using Google as your login identity across dozens of services is that a single compromised or locked account cascades into every connected service simultaneously.
This happens in two ways:
Your Google account is compromised
If an attacker gains access to your Google account — through credential stuffing, a phishing attack, or a SIM swap that gets into your recovery email — they inherit access to every service where you used “Sign in with Google.” They don’t need separate passwords for each service. The Google account was the lock, and they now have the key.
Your Google account is locked or suspended
Google accounts can be suspended for policy violations, payment issues, or automated detection of “suspicious activity” that triggers an account hold. When this happens, you lose access not just to Gmail and Google Photos, but to every service you signed into using that account.
People who have built their entire digital lives on a single Google identity have discovered this the hard way. One automated decision at Google’s systems can lock you out of apps, services, and files spread across the entire internet.
What Google Learns from Social Login Usage
The other dimension of this equation is data collection. When you use Google to sign into third-party services, Google knows which services you’re using and when.
Google’s privacy policy states that it collects information about the Google products and third-party applications you use, how you use them, and the devices you use. The OAuth flow gives Google visibility into when you’re using apps across its login system.
This isn’t theoretical. It’s how Google builds behavioral profiles. Knowing which apps you use, at what times, and in what patterns is exactly the kind of information that powers advertising targeting — which is Google’s core business.
From Google’s perspective, “Sign in with Google” is a tracking mechanism as much as an authentication service. You’re not a customer of the login system; you’re the product it produces data about.
”Sign In with Apple” Does It Differently — Sometimes
Apple’s equivalent offers one meaningful privacy protection that Google’s doesn’t: you can choose to hide your real email address.
When you sign in with Apple, you’re given the option to share your real email or receive a randomly generated relay address (something like abc123@privaterelay.appleid.com). This relay forwards to your real address, but the app never sees it.
The result: the app gets an identifier that doesn’t connect you to your real email, can’t be cross-referenced with other services, and can be individually disabled if you want to stop receiving that app’s emails.
Apple also states that it doesn’t use “Sign in with Apple” data for advertising or to profile you across third-party services.
The limitation: Apple’s relay email approach is only available for apps on Apple platforms (iOS, macOS, etc.). Cross-platform apps sometimes don’t support the option. And Apple’s login is still a centralized identity — a compromised Apple ID still cascades across connected services.
The Practical Risk for Your Personal Files
This connects specifically to personal photo storage, cloud drives, and personal file archives.
If you use “Sign in with Google” to access a cloud storage service, and your Google account is seized or suspended, access to your files follows. The cloud storage provider didn’t verify your identity independently — it trusted Google’s assertion that you are who you say you are. When Google’s assertion is no longer valid, neither is your access.
Similarly, apps that you signed into with Google and that have Google Drive access can read (and in some cases write or delete) content in your Drive. Reviewing which apps have this access is worth doing periodically.
How to Audit and Clean Up Your Connected Apps
On Google
Visit myaccount.google.com/permissions to see every third-party app with access to your account. The list is often longer and older than people expect.
For each app listed:
- If you no longer use it, revoke access
- If it still has access, review what permissions it holds and whether those are still appropriate
- Note which apps have particularly broad access (Gmail, Drive, or Contacts) and prioritize reviewing those
On Apple
Go to Settings → your name → Password & Security → Apps Using Apple ID. You can manage relay email addresses and revoke app access here.
Building a healthier habit
Going forward, consider what you’re giving up before using social login:
- For one-off services you’ll rarely use again: create a standalone account with a unique password from a password manager. No cross-account connection, no persistent access token.
- For important services where you want a stable connection: if you use social login here, make sure that core account (Google or Apple) has the strongest possible security — hardware keys, recovery codes stored offline, an authenticator app rather than SMS.
- For services that handle sensitive personal content: consider whether linking to your primary identity account is the right choice, or whether a separate email login with its own distinct credentials would be more appropriate.
The Account Dependency Map
Most people have no clear picture of which services depend on which identity accounts. That picture matters when something goes wrong.
One useful exercise: spend 20 minutes listing every service you use regularly. Next to each, note what you use to log in — Google, Apple, standalone account, or password manager. Identify which services, if your Google or Apple account became unavailable, would immediately become inaccessible.
That list is your dependency map. For services where losing access would be painful — cloud storage, email archives, productivity tools — the case for standalone credentials with a good password manager is stronger than the convenience argument for social login.
What daftei Does Here
daftei uses its own account system rather than routing authentication through a third-party identity provider. Your daftei account isn’t linked to whether your Google account is active or suspended.
This is a deliberate design choice. Files stored in daftei are accessible through daftei credentials, not through the health of a separate identity platform. If you lose access to Google for any reason, your daftei archive remains accessible independently.
daftei also doesn’t have Google sign-in as an authentication path, which means no OAuth token grants Google visibility into when or how you use daftei. Your file storage activity isn’t data that feeds back into the Google advertising ecosystem.
The trade-off is that you have one more password to manage. A password manager handles this without friction, and the isolation between your cloud archive and your primary social login identity is worth the marginal inconvenience.
The Practical Bottom Line
“Sign in with Google” is not inherently dangerous. It’s a trade-off.
What you gain: convenience, one less password, fast setup.
What you give up: account isolation (a compromise of one account compromises all), visibility (Google knows what apps you use and when), control (you’ve granted persistent access that must be actively revoked), and independence (your access depends on Google’s unilateral decisions about your account).
For services that store sensitive personal content — files, photos, journals, documents — the case for independent credentials is strong. The convenience argument for social login applies less when the content is irreplaceable and when losing access would be genuinely painful.
Know what you’re choosing. Then choose deliberately.