iOS File Protection Reference

Purpose: Comprehensive reference for file encryption and data protection APIs Availability: iOS 4.0+ (all protection levels), latest enhancements in iOS 26 Context: Built on iOS Data Protection architecture using hardware encryption

When to Use This Skill

Use this skill when you need to:

• Protect sensitive user data at rest
• Choose appropriate FileProtectionType for files
• Understand when files are accessible/encrypted
• Debug "file not accessible" errors after device lock
• Implement secure file storage
• Compare Keychain vs file protection approaches
• Handle background file access requirements

Overview