How does DRM work for eBooks? [closed]

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What would be the scheme you recommend to use for an iOS app? Thanks.

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I don't know of the specific DRM api for iOS ebook's, you should register for an apple developer account (free) and check their documentation.

I don't know if iOS has a default ereader app, it does support kindle, amazon's reader, which has it's own proprierty api. There are also standard ebook formats with DRM.

Are you trying to write a ebook reader, or publish an ebook on iOS?