是否可以对应用内购买的内容实施每个 iTunes 帐户的 DRM？
Apple 购买返回的收据不包含购买该内容的用户的 iTunes 帐户信息，而且似乎也没有办法让 Apple 验证给定设备 UUID 是否属于一个 iTunes 帐户。
是否有办法实现一个安全的 DRM 系统，允许用户一次性购买内容并能够在与其 iTunes 帐户关联的所有设备上使用该内容？
如果有办法重放收据或欺骗信息，我不认为它是安全的 DRM 系统。
这个问题，以及随后的问题，我的回答及其评论，激发了我对此的好奇心。
The receipt Apple returns from a purchase does not include the iTunes account information of the user that purchased the content and there also doesn't seem to be way of having Apple verify if a given device UUID belongs to an iTunes account.
Is there anyway to implement a secure DRM system that allows users to purchase content once and be able to use the content for all on all the devices associated with their iTunes account?
If there's a way to replay a receipt or spoof information, I don't consider it a secure DRM system.
This question, and subsequently, my answer and its comments, sparked my curiosity about this.
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不。
No.
我认为苹果不希望您修改他们的 DRM 系统或创建一个新系统...您可以 告诉 Apple 该问题，他们可能可以帮助您。
收据不会包含任何帐户/私人信息，因为大多数应用程序都可以读取收据信息，因此它不希望该信息泄露给任何人。
我所能想到的就是要求用户重新输入他们的 ID 和/或密码。
I think apple doesn't want you to modify their DRM system or make a new one... You could Tell Apple about the problem and they may be able to help you.
The receipt wouldn't include any account/private information since the receipt information can be read by most apps, it wouldn't want that information going around to anyone.
All I could think is to ask the user to reenter their id and/or password.