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iPhone: Preventing Piracy

The current process of cracking an application relies on stripping the application of encryption by attaching a debugger to the application on a jailbroken phone, dumping the text section containing the program code, and reinserting it into the original binary. The below code checks for the existence of LC_ENCRYPTION_INFO, and verifies that encryption is still enabled. There are, of course, a number of ways to defeat this check, but that's the nature of copy protection:
Landon Fuller: Preventing Piracy

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