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Last updated: April 29, 2026
iOS Keychain is hardware-backed. Data Protection classes determine when items are accessible.
iOS Keychain is hardware-backed. Data Protection classes determine when items are accessible.
Data Protection classes
- kSecAttrAccessibleWhenUnlocked — accessible only when device unlocked. Default for new items.
- kSecAttrAccessibleAfterFirstUnlock — after first unlock until reboot. For background tasks.
- kSecAttrAccessibleAlways — anytime. AVOID; deprecated.
- WhenPasscodeSet variants — only if user has passcode set; deletes if passcode removed.
- WhenUnlockedThisDeviceOnly — not synced via iCloud Keychain.
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