How to protect Digital Content (PDF) inside my iOS app?

Question

This question is mainly about protecting the content inside my iOS app. I intend to make an app that will download a lot of content (mainly PDF files) on user request. Once thes

Answer 1

Take look at this article: http://aptogo.co.uk/2010/07/protecting-resources/

The author details encrypting app bundle resources, and then decrypting the files into memory so only the scrambled version ever resides on disk.

They use a custom NSURLProtocol for encrypting on the fly. Pretty nice summary.