核心数据数据加密 [英] Core Data data encryption

问题描述

据我了解，要为Core Data启用数据加密，设备需要启用/打开密码，并将此密钥包含在 addPersistentStoreWithType :方法的可选字典中.我确实为我的设备和项目中的以下代码启用了密码:

From what I understand, to enable data encryption for Core Data the device needed to enable/turn on Passcode and included this key in the optional dictionary for the addPersistentStoreWithType: method. I did enable Passcode for my device and this code in the project:

NSPersistentStore *store = [self.managedObjectContext.persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
                                                                   configuration:nil
                                                                             URL:self.storeURL
                                                                         options:@{ NSPersistentStoreUbiquitousContentNameKey : @"iCloudStore",
                                                                                    NSPersistentStoreFileProtectionKey : NSFileProtectionComplete}
                                                                           error:&error];

但是，当我使用名为Liya(从Mac应用商店下载)的软件直接打开sqlite数据文件时，我能够在sqlite数据库中查看数据.我使用iTunes文件共享将sqlite数据库文件从设备保存到了Mac.

But when I opened the sqlite data file directly using a software called Liya (downloaded from Mac app store), I was able to see the data in the sqlite database. I saved the sqlite database file from my device to my Mac using iTunes filesharing.

由于数据已加密，我是否应该完全无法使用Liya之类的工具直接查看数据?

Since data were encrypted, should I not be able to see data directly using tools such as Liya at all?

推荐答案

加密仅在设备上有效.通过iTunes或Xcode从设备上复制的文件始终会被解密.将设备与iTunes配对时，它会从计算机上的手机创建所有加密密钥的副本.这是必需的，以便iTunes可以在手机锁定时创建备份并进行同步.

The encryption only works on the device. Files you copy off the device via iTunes or Xcode always get decrypted. When you pair your device with iTunes it creates a copy of all the encryption keys from the phone on your computer. That is necessary so iTunes can create backups and sync while your phone is locked.

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