什么是新的“iOS 数据保护 API"? [英] What are the new "iOS data protection APIs"?

问题描述

如果您在 Google 上搜索iphone 数据保护 API"，您会看到基于新闻稿的大量点击.

If you Google "iphone data protection apis" you'll see a zillion hits based on press releases.

如果您查看 http://support.apple.com/kb/HT4175 您可以看到苹果直接做出指示.

If you check out http://support.apple.com/kb/HT4175 you can see Apple making the indication directly.

这些 API 在哪里/是什么?我在 iOS4 之前使用过旧的加密 API，所以它们不是 那些.这些 API 应该为第 3 方应用程序提供 MDM(移动设备管理)类型的功能.

Where are/what are these APIs? I've used the old crypto APIs before iOS4, so they're not those. These APIs are supposed to give MDM (Mobile Device Management)-type capability for 3rd-party apps.

TIA！

推荐答案

在将 NSData 写入磁盘时，您可以设置一些 FileProtection 选项:

There are some FileProtection options you can set when writing an NSData to disk:

• NSDataWritingFileProtectionComplete
• NSDataWritingFileProtectionNone)

还有一个扩展属性NSFileProtectionKey，你可以通过NSFileManager设置磁盘上预先存在的文件:

as well as an extended attribute, NSFileProtectionKey, you can set on pre-existing files on disk via NSFileManager:

• NSFileProtectionComplete
• NSFileProtectionNone

当您的应用程序能够(不)能够访问受保护的数据时，还会通知应用程序委托:

The app delegate is also informed of when your application is (not) going to be able to access protected data:

• -applicationProtectedDataDidBecomeAvailable:
• -applicationProtectedDataWillBecomeUnavailable:

加密和保护数据的所有细节都由硬件和操作系统代表您处理.每当设备锁定时，它就会启动即发即弃保护.

All the gory details of encrypting and securing the data are handled by the hardware and OS on your behalf. It's fire-and-forget protection that kicks in whenever the device locks.

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