iOS File Protection Reference

关于

This skill serves as a detailed technical reference for developers implementing secure file storage on Apple platforms using the Data Protection architecture. It helps engineers choose the correct FileProtectionType based on data sensitivity, manage background file access, and navigate the trade-offs between local file encryption and Keychain storage. Whether you're debugging 'file not accessible' errors or setting up default app-wide security policies, this resource offers battle-tested Swift examples and best practices for protecting sensitive user data at rest to ensure compliance with modern privacy standards.

主要功能

• Decision matrix comparing File Protection against Keychain storage strategies
• Best practices for securing application databases like SwiftData and SQLite
• Comparison of protection levels including complete, unlessOpen, and untilFirstUnlock
• Guidance on background file access requirements and handling lock-state errors
• 61 GitHub stars
• Swift implementation patterns for setting file and directory-level security attributes

使用场景

• Implementing maximum security for sensitive user health or financial records
• Configuring secure default file protection policies during app initialization
• Resolving file access permission issues occurring while the device is locked or in the background