iOS Keychain: Store Tokens With the Right Scope
An app stores an authentication token in plain preferences. This guide gives you a small, testable way to approach the issue before changing a live system.
A practical workflow
- Use Keychain Services with an accessibility class that matches when the app needs the value.
- Test device lock, reinstall and account sign-out behavior.
What to check
A keychain item can outlive an app install in some circumstances; clear account state deliberately. Compare the result with the original problem and record what changed. If a measurement or test does not support the change, revisit the assumption rather than adding more complexity.
Keep the experiment small enough to reverse. Document the starting state, the change and the result so another person can repeat the process. Product menus and versions can change, so check the current documentation for your environment.
Official reference: Read the documentation.