flutter-secure-storagelisted

# Flutter Secure Storage Encrypted storage backed by iOS Keychain and Android Keystore. Use it to store sensitive data. --- ## Installation ```bash flutter pub add flutter_secure_storage ``` ## Platform Setup ### Android (android/app/build.gradle) ```groovy android { defaultConfig { minSdkVersion 18 // minimum API 18 } } ``` ### iOS (ios/Runner/Info.plist) — optional ```xml <!-- to preserve data after app deletion --> <key>SecAttrAccessible</key> <string>kSecAttrAccessibleAfterFirstUnlock</string> ``` --- ## Quick Reference ### Basic Usage ```dart import 'package:flutter_secure_storage/flutter_secure_storage.dart'; const storage = FlutterSecureStorage(); // write await storage.write(key: 'access_token', value: 'abc123'); await storage.write(key: 'refresh_token', value: 'xyz789'); // read final token = await storage.read(key: 'access_token'); // delete await storage.delete(key: 'access_token'); // delete all await storage.deleteAll(); // read all keys final allKeys = await storage.readAll(); ``` ### Android Options (EncryptedSharedPreferences) ```dart const storage = FlutterSecureStorage( aOptions: AndroidOptions( encryptedSharedPreferences: true, // recommended for API 23+ ), ); ``` ### iOS Options ```dart const storage = FlutterSecureStorage( iOptions: IOSOptions( accessibility: KeychainAccessibility.first_unlock, // to retain data after app reinstall: // accessibility: KeychainAccessibility.first_unlock_this_dev