Reducing piracy of iPhone applications

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UPDATE

Please visit and read

Thanks to chpwn in the comments.

Code that’s way too old! – 11th May 2009

For now there’s an easier way to detect if your iPhone application has been cracked for piracy use. This does not involve you to check the iPhone unique IDs against a list of accepted IDs.

Currently there are three things crackers do:

  1. Edit the Info.plist file
  2. Decode the Info.plist from binary to
    UTF-8 or ASCII
  3. Add a key-pair to Info.plist{SignerIdentity,
    Apple iPhone OS Application Signing}

The last one is easiest to check with this code:

NSBundle *bundle = [NSBundle mainBundle]; 
NSDictionary *info = [bundle infoDictionary]; 
if ([info objectForKey: @"SignerIdentity"] != nil) 
{ /* do something */  }

Generally we don’t have SignerIdentity in any of the App Store applications we build so checking for nil then performing set instructions should make it more difficult for crackers and pirates.

I can’t take credit for this so please visit How to Thwart iPhone IPA Crackers. There’s loads of information there about piracy on iPhone and how to curb it.

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